Patent Publication Number: US-2022224156-A1

Title: Portable power charger with means for attachment to an electronic device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part and claims the benefit of U.S. application Ser. No. 16/829,806, filed Mar. 25, 2020, now U.S. Pat. No. 11,271,427, which is a continuation-in-part and claims the benefit of U.S. application Ser. No. 15/802,552, filed Nov. 3, 2017, now U.S. Pat. No. 10,615,552, which is a continuation and claims the benefit of U.S. application Ser. No. 15/488,871, filed Apr. 17, 2017, now U.S. Pat. No. 10,418,839, which claims the benefit of U.S. Provisional Application Ser. No. 62/322,954, filed Apr. 15, 2016, each of which is incorporated herein by reference in its entirety. 
    
    
     FIELD OF INVENTION 
     The present invention generally relates to a power charging apparatus, and more particularly relates to a portable power charger and an associated system for attaching said portable power charger to mobile electronic devices for charging. 
     BACKGROUND OF THE INVENTION 
     Present day consumers typically own several electronic devices specifically designed for portability and on-the-go use, including, for example, a mobile phone or smart phone, a portable music player like an iPod® or an MP3 player, a tablet, a portable gaming unit, a camera, and the like. Each of these devices requires frequent recharging. Such electronic devices typically utilize a cable for connecting the device to a power source, such as a wall outlet, a car charger, an airplane charger, or a computer. However, a separate cable is usually required for each power source. Moreover, different electronic devices often utilize different connection ports and interfaces such that a single charging cable is not compatible with multiple devices. Accordingly, a tech-savvy consumer, with several electronic devices, will usually have multiple charging cables to keep track of. Even then, the consumer may be without sufficient power to recharge a phone due to bad weather or a power outage, or may not always be in a place where a power source is readily available, or even if so, may not have the appropriate cable or adapter available to use with a particular power source. 
     With traditional power sources, such as those noted above, it is often difficult to charge multiple devices at the same time, especially where each device requires a separate charging cable. For example, a car charger port may only handle a single cable at a time. Adaptor devices are available on the market for connecting multiple devices to a power source at the same time—for example, a two-to-one or three-to-one car charger splitter. However, such adapters are often only compatible with certain interfaces. Moreover, such adapters are separate from portable power sources and tend to be bulky. 
     Similarly, connection interface attachments are also available for adapting a charging cable for use with a variety of devices for recharging from a power source, each requiring a different interface connection. However, such attachments are usually separate small pieces, and therefore difficult to keep track of when not in use. Further, use of such attachments does not solve the problem presented by the need to charge multiple devices at the same time, from the same power source, as oftentimes, only one attachment can be used with a charging cable at a time. 
     Portable power chargers exist that permit recharging of electronic devices when a standard power source is not readily available. For example, portable power chargers are illustrated and described in Applicant&#39;s U.S. Pat. No. 9,973,016, which shares common inventors with the present application and which is incorporated herein by reference. Some existing power charger devices usually cannot charge multiple devices at the same time, either due to limited capacity or connectivity options. Even if multiple devices may be attached to the power charger at the same time, the charger may prioritize how the devices are recharged—i.e., it will charge one device first and then the second, and so on. However, this approach takes a long time to recharge all devices and risks not having sufficient charge remaining in the charger for fully charging the second device. 
     Further, some portable charger devices will not permit recharging from the portable power charger when the charger is itself being recharged or connected to an external power source. Such devices require the charger unit to be disconnected from a power source before a charge will be passed on to a device connected to the charger, or require the charger unit to be fully charged first before any device connected to the charger unit can then be recharged. 
     In addition, portable power chargers generally remain separate from and unattached to electronic devices when the portable power chargers are not in use and are only connected to electronic devices via cables and adapters when recharging the electronic devices. This means that the portable power charger must be carried separately from and in addition to the electronic device when not in use so that it is available when needed to charge the electronic device. Even when the portable power charger is connected to an electronic device via a connector cable and/or adapter for charging, simultaneously carrying both the portable power charger and the electronic device in one&#39;s hands is awkward and unwieldy, one or both of the devices could be accidentally dropped, and the charging cable can be easily disconnected from the charger and/or the device, disrupting the charging process. 
     Wireless power chargers have also been introduced to the market, especially for mobile electronic devices, that have provided additional approaches to recharging portable electronic devices. Such wireless power transmission devices have been developed in connection with wireless charging standardization efforts, including by the Wireless Power Consortium (WPC), which have led to the adoption of devices that permit recharging of electronic devices without the use of separate chargers for each device. More particularly, the WPC has introduced the Qi wireless charging standard. Qi, which translates to “vital energy,” takes its name from the Chinese concept of intangible flow of power and utilizes magnetic coil induction to transmit a charge from a transmitter to a receiver via a magnetic field. 
     Commonly, a wireless power transmission device utilizing magnetic coil induction includes a charging mat that must be connected to an external power source, such as a wall socket or a car charger socket, in order to transmit power wirelessly. The charging mat includes a transmitter having an induction coil. When a current is passed through the transmitter coil, a magnetic field is generated and transmitted to an electronic device placed on the charging mat. Such a device, in order to be wirelessly charged via the charging mat, must include a receiver having an induction coil, typically connected to the internal battery of the electronic device. When the electronic device is placed on an energized charging mat in a particular location, the receiver receives the wirelessly transmitted power in the form of a magnetic field, which induces a voltage in the receiver coil that can be used to power the electronic device or charge the internal battery of such a device. 
     Various drawbacks of prior art wireless power chargers have been identified. For example, such wireless chargers are not easily portable and require direct connection to an external power source for operation. Such external power sources are often not readily available, which makes the charger useless for on-the-go use. Additionally, some charging mat designs are often too small to be able to charge more than one electronic device at the same time. As noted, some wireless charging mats require a device to be placed in a particular spot—e.g., a Qi spot—where the transmitter and receiver coils must be properly aligned in order for a charge to be transmitted. If the devices are not properly aligned, there may be no charging. Accordingly, a drawback of prior art wireless charging devices is that it is difficult to ensure that the devices are properly aligned in order to ensure charging activity and efficiency. 
     In view of the foregoing, there is a need for a charger that can be used to charge a variety of electronic devices, including but not limited to smart phones, mobile phones, data tablets, music players, cameras, camcorders, gaming units, e-books, Bluetooth® headsets and earpieces, GPS devices, and the like, either individually or simultaneously in various combinations. Additionally, there is a need for such a charger that is portable, has a compact size, is attachable to an electronic device for easy carry and use with the electronic device, and further is easy to use in various conditions and locations to charge one or more electronic devices simultaneously, including but not limited to in a house or office, a car or an airplane, as well as on-the-go, without compromising operation and performance. Further, there is a need for a portable charger that is easily attachable to and detachable from an electronic device allowing for convenient and hands-free charge and carry. Still further, there is a need for an attachment system for such a portable charger that can ensure proper alignment between the charger and an electronic device in need of a recharge in order for the electronic device to be wireless recharged from the portable charger. Still further, there is a need for a portable charger that can be recharged from an external power source or from a wireless power transmission device, providing increase flexibility and convenience of use for the portable charger. Still further, there is a need for a portable charger that can recharge its internal battery from an external power source or a wireless charging device at the same time as an electronic device connected to the charger, either directly or wirelessly, is being recharged by or via the charger unit. Still further, there is a need for a portable charger unit in a compact size that has increased functionality for a user requiring a portable source of power without compromising its ability to successfully and consistently connect to and charge electronic devices, either directly or wirelessly. 
     Accordingly, it is a general object of the present invention to provide a portable charger that improves upon conventional power chargers currently on the market and that overcomes the problems and drawbacks associated with such prior art chargers. 
     SUMMARY OF THE INVENTION 
     In accordance with the present invention, a portable power charger is provided for charging one or more portable electronic devices. In general, a portable power charger includes a charger housing having a rechargeable battery unit disposed therein for connecting to and recharging one or more electronic devices, as necessary, and may also include wireless power transmission components, such as a transmitter and a receiver, for recharging the charger as well as electronic devices via wireless power transmission methods. The portable power charger may also include at least one power connection port for directly connecting the portable power charger with an external power source, or at least one electronic device, or both. Similarly, the portable power charger may also include at least one connector cable interface for directly connecting the portable power charger with an external power source, or at least one electronic device, or both. 
     In embodiments of the present invention, the portable power charger can include a wireless transmitter operatively connected to the internal rechargeable battery for transmitting a power charge to an electronic device having a wireless receiver. The portable power charger may further include a wireless receiver operatively connected to the internal battery for receiving a power charge from a power source having a wireless transmitter. In embodiments of the portable power charger including both a wireless transmitter and a wireless receiver, the portable power charger can both be charged wirelessly, for example, when placed on a wireless power transmission device (e.g., wireless charging mat), and charge other devices wirelessly, for example, when a device is placed on the charger housing. 
     In alternate embodiments of the present invention, the portable power charger can simply be designed for direct charging of electronic devices—for example, through connection via a power connection port provided on the charger housing or via a connector cable provided with the portable power charger. Such a connector cable can be storable within a storage cavity formed in the charger housing where the connector cable is stored when not in use and from which the connector cable can be flexed out for connection to an electronic device in need of a charge from the portable power charger or alternately to an external power source for recharging the internal battery unit of the portable power charger. Further, the connector cable can be fully removed for use with a power connection port provided on the charger housing, or operatively connected with the internal battery unit through the storage cavity. Still further, a number of interchangeable connector cables can be provided with the portable power charger, each adapted to be stored in a common storage cavity, and changed out with one another as needed. 
     In addition, in accordance with an aspect of the present invention, the portable power charger includes an attachment system, preferably comprising at least two disparate attachment means for attaching the portable power charger to an electronic device, and vice versa, so that the portable power charger and the electronic device can connected together during charging, and more preferably, be properly aligned relative to one another for efficient wireless transmission. Additionally, the attachment of the portable power charger directly to the electronic device permits the charger and electronic device to be carried by the user as one unit, while also facilitating and improving the charging of the electronic device, either by wireless charging, or by direct charging connection, in accordance with embodiments of the present invention. Still further, the attachment means ensure proper alignment of the electronic device with the portable power charger for wireless Qi charging, and also maintain such alignment during the charging process—for example, a transmitter induction coil in the charger is aligned with a receiver induction coil in the electronic device to ensure proper and efficient wireless connection therebetween. 
     In an embodiment of the present invention, the portable power charger is attachable to an electronic device via first attachment means comprising one or more magnets disposed on the surface or within the charger housing that interact with a complementary arrangement of one or more magnets or metal pieces provided on the surface of or in an electronic device, allowing for hands free carry and charge. The magnet(s) allows the portable power charger to remain connected to the electronic device while charging but also allows for seamless removal when the charge is completed by pulling the portable power charger apart from the electronic device. Not only do the magnetic components work to connect the electronic device to the portable charger, but in accordance with the present invention, the magnetic components work to position and ensure proper alignment of the respective charging components in the charger and the electronic device. 
     Additionally, the portable power charger is attachable to an electronic device via a second attachment means, beneficial, for example, in connecting an electronic device to the portable power charger when said device does not have the means to magnetically connect to the power charger using the first attachment means. In an embodiment of the present invention, the second attachment means comprises grooves formed into the sides of the charger housing, or projections or ribs projecting out from the sides of the charger housing, that interact and engage complementary shaped projections or ribs on the one hand, or grooves on the other hand, formed into an adapter configured to be mounted onto the charger and hold an electronic device in place adjacent to the charger, and more preferably hold said device in an aligned position optimal for wireless charging from the charger to the device. 
     In alternate aspects of the present invention, the adapter may comprise a cradle or docking station for the portable power charger, and when the charger is attached to the cradle or docking station via the second attachment means, the portable power charger can be charged itself. For example, the portable power charger may be charged through a direct connection to the cradle or docking station, such as via a USB interface. In the alternative, the portable power charger may be charged through wireless charging means, such as via a wireless connection between a wireless transmitter in the cradle or docking station and a wireless received in the portable power charger. Still further, the portable power charger can be recharged using solar panels associated with the cradle or docking station. 
     In further alternate aspects of the present invention, multiple adapters may be used simultaneously, and connected to the portable power charger using the second attachment means. For example, the portable power charger can be attached to a first adapter, such as a cradle or docking station. Thereafter, a second adapter can be attached to the charger, again using the second attachment means, whereby the second adapter provides a means for mechanically positioning an electronic device, such as a phone, in proximate relationship to the portable charger for charger purposes. 
     In yet a further aspect of the present invention, the second attachment means can be used to position a portable power charger in proximate relationship to an electronic device for charging in connection with a protective case that slides around the portable charger and the electronic device and maintains the relative position of the two devices during charging, as well as during storage and/or transport (i.e., when the two are being collectively carried in a bag, purse or briefcase). 
     Alternative attachment means that may be used with the portable power chargers in accordance with the present invention may comprise an adhesive patch or a suction cup that, when pressed against the surface of an electronic device, attaches the electronic device to the charger and allows for hands-fee carry and charge. The adhesive, or sticky, patch and suction cup options allow the portable power charger to remain stuck to the electronic device while charging but also allows for seamless removal when the charge is completed by pulling the portable power charger apart from the electronic device. These attachment means are useful when the electronic device is need of a recharge does not include a complementary array of magnets or metal pieces allowing for attachment to the charger via the magnets disposed on the power charger. 
     In accordance with preferred embodiments of the present invention, the attachment system comprises a plurality of magnets, as a first attachment means, geometrically arranged in spaced apart relationship to one another on or near the surface of the portable charger and positioned around the wireless transmission area of the charger so as not to interfere with the wireless transmissions from the transmitter. The grooves or projections can be used in connection with the magnetic components without either attachment means interfering with use and operation of the other attachment means. 
     In one embodiment, an electronic device is provided with an array of magnets geometrically arranged in spaced apart relationship to one another on or near the surface of the electronic device and positioned around the wireless receiving area of the electronic device so as not to interfere with the wireless transmissions directed to the wireless receiver, wherein the geometric arrangement of magnets on the electronic device is complementary to the geometric arrangement of magnets on the charger to ensure proper alignment between the wireless transmitter of the portable charger and the wireless received of the electronic device. In an alternate embodiment, a separate attachment chip is provided that can be attached to an electronic device, whereby the chip includes an array of magnets geometrically arranged in spaced apart relationship to one another such that the array of magnets will be positioned around the wireless receiving area of the electronic device when the chip is connected to said device, wherein the geometric arrangement of magnets on the attachment chip is complementary to the geometric arrangement of magnets on the charger. In another embodiment, the geometric arrangement of magnets for the electronic device can be provided in a case adapted for the electronic device that will place the arrangement in a predetermined location relative to the wireless receiver of said device. 
     In alternate embodiments, the array on the electronic device or the attachment chip can be pieces of metal that magnetically engage the magnets of the power charger to align the electronic device with the portable charger for wireless charging. 
     In accordance with embodiments of the present invention, the portable power charger comprises a charger housing with a rechargeable internal battery disposed therein. The internal battery is operatively connected with the wireless transmitter and receiver for charging other electronic devices from the internal battery via the wireless transmitter or for relaying an electrical charge from an external power source for recharging the internal battery when the portable power charger is connected to the power source via the wireless receiver. The charger unit is portable as a result of the small size of the housing. Despite the small size of the unit, the power capacity is very high so that the charger can accommodate multiple electronic devices at the same time. 
     Additionally, the portable power charger may include one or more power connection interfaces for directly connecting the portable charger with an external power source, or at least one electronic device, or both. For example, the rechargeable internal battery disposed within the charger housing is operatively connected with a power connection interface (such as, a port or a charging cable) for relaying an electrical charge from an external power source for recharging the internal battery when the portable power charger is connected to the power source via the power connection interface (acting as a power input) and/or for charging other electronic devices from the internal battery via the power connection interface (acting as a power output). 
     In embodiments of the present invention, a power connection interface can comprise a female connection port adapted for receiving a complementary male connection interface of a standard charging cable, which connects at an opposite end to a portable electronic device. In other embodiments, a power connection interface can include a charging cable attached to or provided with the charger housing and preferably stored within a storage cavity in the charger housing when not in use. Such charging cable can even be removable and replaceable with another charging cable so as to change the connection interfaces, as necessary, to coordinate with particular electronic devices. In preferred embodiments of the present invention, the portable power charger includes both wireless charging capabilities, and direct charging connectivity. 
     In accordance with alternate embodiments of the present invention, the portable power charger comprises a charger housing with a rechargeable internal battery disposed therein. The internal battery is operatively connected with one or more power connection interfaces for directly connecting the portable charger with an external power source, or at least one electronic device, or both. For example, the rechargeable internal battery disposed within the charger housing is operatively connected with a connector cable storable in a storage cavity formed in the charger housing for storing the connector cable when not in use and from which the connector cable can be flexed for connection with an electronic device in need of a charge from the internal battery unit of the portable power charger or an external power source for recharging the portable power charger. More preferably, the connector cable is removable and interchangeable with like-shaped connector cables, each with a different connection interface so that the portable power charger can be connected to various electronic devices. Additionally, the portable power charger is attachable to an electronic device via attachment means comprising grooves or projections formed on the sides of the charger housing that interact and engage with an adapter that can hold and position an electronic device in position relative to the charger for charging, and allows for hands-fee carry and charge. The adapter, as held by the grooves or projections on the portable charger, allows the electronic device to be “attached” to the portable power charger while charging but also allows for seamless removal when the charge is completed by sliding the electronic device out of the adapter, or simply removing the adapter from the portable power charger. 
     In additional embodiments the portable power charger of the present invention can be used to charge multiple electronic devices simultaneously, both via direct connection and wirelessly, as disclosed, for example in U.S. Pat. No. 9,318,915, which shares common inventors with the present invention, and which is incorporated herein by reference. 
     In various embodiments of the present invention, the portable power charger may further comprise a controller or processing unit, which can control wireless and direct connectivity with the portable power charger, keep track of the capacity level of the rechargeable battery, store data or provide a conduit means by which data can be exchanged between electronic devices, such as between a smart phone and a computer. 
     In various embodiments of the present invention, the charger unit may include a flashlight feature located on the surface of the housing unit to improve on the functionality of the charger. 
     These and other objects, features and advantages of the present invention will become apparent in light of the detailed description of embodiments thereof, as illustrated in the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a front, top perspective view of a first embodiment of a portable power charger in accordance with the present invention. 
         FIG. 2  shows a front, bottom perspective view of the portable power charger of  FIG. 1 . 
         FIG. 3  shows a planar bottom view of the portable power charger of  FIG. 1 . 
         FIG. 4  shows a planar front-end view of the portable power charger of  FIG. 1 . 
         FIG. 5  shows a planar side view of the portable power charger of  FIG. 1 . 
         FIG. 6  shows a schematic diagram illustrating internal operational components of the portable power charger of  FIG. 1 . 
         FIG. 7  shows a planar view of a portable electronic device that can be wirelessly recharged by attachment to the portable power charger of  FIG. 1 . 
         FIGS. 8A, 8B and 8C  illustrate attachment of the portable electronic device of  FIG. 7  to the portable power charger of  FIG. 1  in accordance with embodiments of the attachment system of the present invention. 
         FIGS. 9A and 9B  illustrate attachment orientations of the portable electronic device of  FIG. 7  relative to the portable power charger of  FIG. 1 . 
         FIGS. 10A-10E  illustrate front and back perspective views and planar front, back and side views of a first embodiment of an attachment chip in accordance with the present invention for use to connect an electronic device with the portable power charger of  FIG. 1 . 
         FIG. 11  shows a perspective view of a portable electronic device having the attachment chip of  FIG. 10A  that can be wirelessly recharged by attachment to the portable power charger of  FIG. 1 . 
         FIGS. 12A and 12B  illustrate attachment of the portable electronic device with attachment chip per  FIG. 11  to the portable power charger of  FIG. 1  in accordance with an embodiment of the attachment system of the present invention. 
         FIGS. 13A, 13B and 13C  illustrate use of the attachment chip per  FIG. 11  with an electronic device and a protective case therefor. 
         FIG. 14  shows a front, top perspective view of a second embodiment of a portable power charger in accordance with the present invention. 
         FIG. 15  shows a front, bottom perspective view of the portable power charger of  FIG. 14  with a bottom flap folded backwards to expose attachment means. 
         FIG. 16  shows a front, bottom perspective view of the portable power charger of  FIG. 14  with a bottom flap being folded closed to cover and protect the attachment means. 
         FIG. 17  shows a bottom planar view of the portable power charger of  FIG. 14 . 
         FIG. 18  shows a front-end planar view of the portable power charger of  FIG. 14 . 
         FIG. 19  shows a front, top perspective view of a third embodiment of a portable power charger in accordance with the present invention. 
         FIG. 20  shows a back, bottom perspective view of the portable power charger of  FIG. 19 . 
         FIG. 21  shows a front-end planar view of the portable power charger of  FIG. 19 . 
         FIG. 22  shows a side planar view of the portable power charger of  FIG. 19 . 
         FIG. 23  is a front, top perspective view of the portable power charger of  FIG. 19  with connector cables partially removed for use. 
         FIG. 24  is a back, bottom perspective view of the portable power charger of  FIG. 19  with connector cables partially removed for use. 
         FIG. 25  shows a front, top perspective view of a fourth embodiment of a portable power charger in accordance with the present invention. 
         FIG. 26  shows a top perspective view of a fifth embodiment of a portable power charger in accordance with the present invention. 
         FIG. 27  shows a side, end perspective view of the portable power charger of  FIG. 26 . 
         FIG. 28  shows a top perspective view of the portable power charger of  FIG. 26  with an electronic device attached by a magnetic attachment means. 
         FIG. 29  shows a planar side view of the portable power charger and electronic device as connected in the embodiment of  FIG. 28 . 
         FIG. 30  shows a top perspective view of the portable power charger of  FIG. 26  being inserted into a cradle adapter in accordance with the present invention. 
         FIG. 31  shows a top perspective view of the portable power charger of  FIG. 26  seated in the cradle adapter of  FIG. 31 . 
         FIG. 32  shows a top, side perspective view of the portable power charger of  FIG. 26  mounted to a cradle adapter and with an electronic device attached by magnetic attachment means. 
         FIG. 33  shows a top perspective view of the portable power charger of  FIG. 26  being connected with a device mounting adapter in accordance with the present invention. The portable power charger is already attached to a cradle adapter as illustrated in  FIG. 31 . 
         FIG. 34  shows a top perspective view of the portable power charger of  FIG. 26  attached to a cradle adapter of  FIG. 30  and a device mounting adapter of  FIG. 33 . 
         FIG. 35  shows a top perspective view of a phone attached to the portable power charger of  FIG. 26  using the device mounting adapter of  FIG. 33 . 
         FIG. 36  shows a top perspective view of a protective case for use with the portable power charger of the present invention. 
         FIG. 37  shows a top perspective view of the portable power charger of  FIG. 26  and an electronic device attached together using the protective case of  FIG. 36 . 
     
    
    
     DETAILED DESCRIPTION OF THE DRAWINGS 
     A portable power charger in accordance with an embodiment of the present invention is illustrated in  FIGS. 1-5 , and generally designated as reference numeral  10 . The portable power charger  10  generally includes a charger housing  12  having a rechargeable battery unit  14  internally disposed therein. The rechargeable battery unit  14  is generally illustrated in  FIG. 6 . The power charger  10  is designed for portability and convenient on-the-go use to recharge one or more mobile electronic devices and is designed to be attachable to an electronic device via an attachment system comprising at attachment means provided on or in the charger housing  12 . In some embodiments of the present invention, the charger  10  is provided with least two disparate attachment means, each described in more detail below, that allow for hands free carry and charge, while also allowing for easy detachment from the electronic device, once attached and as needed. 
     The portable power charger  10  is also designed for easy and flexible recharging of the internal battery  14  from a variety of power sources so that it can be easily charged up to have sufficient battery capacity when it is needed to recharge a portable electronic device. Preferably, the rechargeable battery unit  14  of the portable power charger  10  is capable of being recharged in a variety of manners, including via direct connection and via wireless connection. For example, to charge the battery unit  14 , the charger  10  may be connected with an external power source via a power input connector cable interface provided with the charger  10 ; via direct connection with an external power source via a separate connector cable that engages a power connection port interface provided on the charger housing  12 ; or via wireless power transmission means. A portable power charger  10  in accordance with the present invention can include any or all of these recharging features in various combinations without departing from the principles and spirit of the present invention. 
     Similarly, the portable power charger  10  can be used to recharge one or more electronic devices in a variety of manners, including via direct connection and via wireless connection. For example, to use the portable charger  10  to recharge an electronic device, generally designated as reference numeral  200  and generally illustrated, for example, in  FIG. 7 , the charger  10  may be connected with the electronic device  200  via a power output connector cable interface provided with the charger  10  (as illustrated in the charger embodiment shown in  FIGS. 19-25 ); via direct connection with the electronic device  200  via a separate connector cable  202  that engages a power connection port interface  16  (as shown, for example, in  FIG. 8C ) provided on the charger housing  12 ; or via wireless power transmission means. A portable power charger  10  in accordance with the present invention can include any or all of these recharging features in various combinations without departing from the principles and spirit of the present invention. 
     Referring to the embodiment illustrated in  FIGS. 1-5 , the portable power charger  10  of the present invention has the capability of charging other devices or being recharged itself via wireless transmissions, or via direct connections, either using connector cables provided with and stored in the charger housing  12 , or via separate connector cables attachable to the charger  10  via power connection ports provided on the charger housing  12 . In this regard, the portable charger  10  can be used on-the-go to charge one or more electronic devices  200  by various means and combination of means. 
     As noted, the portable power charger  10  of the illustrated embodiments includes the capability of charging electronic devices  200  via wireless power transmission. In this regard, the portable power charger  10  includes a wireless transmitter  26  for transmitting a charge to an electronic device  200 , as schematically illustrated in  FIG. 6 . In alternative or additional embodiments, the portable power charger  10  may also include a wireless receiver  36  for receiving a charge from a wireless charging mat or power transmitting device allowing the charger unit  10  to be recharged either wirelessly or via direct connection to an external power source, and at the same time be connected to multiple electronic devices  200  by both wireless and direct connection means such as disclosed in U.S. Pat. No. 9,318,915, incorporated herein by reference. 
     The wireless transmitter  26  of the portable power charger  10  generally comprises a magnetic induction coil (not shown) operatively connected to the internal battery unit  14 . Referring to  FIG. 3 , a wireless transmission area  27  generally aligned with the transmitter coil is illustrated. When an electronic device  200  that includes a wireless receiver (as represented by a wireless reception area  237 ) is aligned with the wireless transmission area  27 , a magnetic field generated by the transmitter  26  is transmitted to the electronic device  200 , where a voltage is induced to power the electronic device  200  or recharge its internal battery. In this regard, the designated wireless transmission area  27  is preferably visible to the user or at least easily ascertained so as to facilitate proper alignment and wireless charging. 
     Referring to  FIG. 3 , the portable power charger  10  includes an attachment system in accordance with the present invention on or disposed within and near a first outer surface  21  of the charger housing  12 . A first attachment means, generally designated as reference numeral  80 , comprises an arrangement of one or more magnets  22  that interact with magnets or metallic pieces  222  provided on or within the surface of the electronic device  200 . When the respective magnets  22  and  222  are aligned, the electronic device  200  is attached to the portable charger  10  for wireless charging of the electronic device  200 , while also allowing for hands free carry and charge. 
     In an embodiment of the present invention, said first attachment means  80  comprises one or more magnets  22  geometrically arranged on or within the first surface  21  of the charger housing  12  in spaced apart relationship to one another. An electronic device  200  is provided with a complementary geometric arrangement of magnets  222  in spaced apart relationship to one another, whereby interaction of the respective geometric arrangements on the portable charger  10  and the electronic device  200  ensure proper alignment of the charger  10  with the electronic device  200  for efficient wireless charging. Use of the first attachment means  80  also allows the portable power charger  10  to remain connected to the electronic device  200  while charging but also allows for seamless removal when the charge is completed. Using the illustrated magnetic array on the portable charger  10 , the power charger  10  can be attached to a variety of electronic devices  200  and ensure proper alignment for wireless charging regardless of the size and shape of the electronic device  200 , so long as the geometric array of magnets  222  on said devices  200  is properly positioned relative to the appropriate wireless transmission components therein. 
     The magnetic array  22  on the portable charger  10  could be one, two or even more magnets  22 . More preferably, the first attachment means  80  utilizes at least three magnets  22  in a geometric arrangement relative to one another. Even more preferably, the first attachment means  80  utilizes four magnets  22  in a geometric arrangement in spaced apart relationship relative to one another. Referring to  FIG. 3 , an embodiment of the portable charger  10  with four magnets  22  generally arranged to define a square is illustrated. Preferably, the arrangement of magnets  22  is positioned around and defines an opening  24  generally corresponding to the transmitter induction coil used in the charger  10  for wireless transmission of power to an electronic device  200 . Referring to  FIG. 3 , the four magnets  22  are illustrated as being around the circular transmission area  27  generally aligned with the transmitter induction coil disposed within the charger housing  12 . In this regard, the positioning and location of the magnets  22  does not interfere with wireless transmission from the charger  10  or degrade the transmitted charge, while also ensuring that the electronic device  200  in need of a recharge is properly aligned with the transmission area  27  of the charger  10  for optimal and efficient recharging. 
     In another aspect of the present invention, an electronic device  200  that can be wirelessly charged from the portable charger  10  is provided with one, two or even more magnets  222  in an arrangement that generally complements the number, location and orientation of magnets  22  on the portable charger  10 . For example, an electronic device  200  to be used with the portable charger  10  shown in  FIG. 1 , would have four magnets or metal pieces  222  geometrically arranged to define a square with the same spacing and size as on the portable charger  10 . An exemplary electronic device  200  is illustrated in  FIG. 7 . As so designed, the magnet arrays  22  and  222  will interact with each other to connect the electronic device  200  to the portable charger  10 . As with the magnetic array  22  on the charger  10 , the magnetic array  222  on the electronic device  200  is preferably positioned around and defines an opening  224  generally corresponding to the receiver induction coil (not shown) used in the device  200  for receiving a wireless transmission of power from a power source (i.e., the portable charger  10 ) generally represented by reception area  237  depicted in  FIG. 7 . Thus, when the respective magnetic arrays  22  and  222  are connected, as represented in  FIGS. 8A and 8B , the electronic device  200  is properly aligned with the portable charger  10  so that the receiver in the former is aligned with the transmitter  26  in the latter to maximize the wireless power exchange. Additionally, the magnets  22  and  222  maintain their connection so that there is reduced risk of the electronic device  200  shifting, moving or even coming disconnected during charging. 
     By using a square arrangement for the magnets  22  on the charger  10 , and further by arranging the magnets  22  around the transmission area  27  of the charger  10 , any electronic device  200  having a complementary arrangement of magnets or metal pieces  222  can be connected to the portable charger  10  in either of two directions but still be ensured of having the critical wireless transmission components aligned, as generally illustrated in Applicant&#39;s co-pending U.S. application Ser. No. 15/802,552, incorporated herein by reference. Moreover, electronic devices  200  of any size or shape can be perfectly aligned with the portable charger  10  merely by including a magnetic or metallic array matching the geometric arrangement of magnets  22  on the portable charger  10 . Alternate numbers and arrangements of magnets can be used without departing from the principles and spirit of the present invention. Using three or more magnets in a spaced apart geometric arrangement will ensure consistent and desired X- and Y-alignment between the portable charger  10  and the electronic device  200 . 
     In an alternate embodiment, an attachment chip  100  can be used to provide electronic devices  200  with means for attachment to and proper alignment with the portable charger  10  shown herein. Such an attachment chip  100  is beneficial for electronic devices  200  that have not been previously provided with the requisite magnets or metal pieces  222  for magnetic attachment to the portable power charger  10 . Indeed, electronic devices  200  can be retrofitted for such connection using the attachment chip  100 . Indeed, the attachment chip  100  can be used to connect an electronic device  200  to the portable power charger  10  even if the electronic device  200  is not capable of wireless charging or the portable charger  10  does not include a wireless transmitter (in accordance with alternate embodiments of the present invention). In this regard, the attachment chip  100  (as provided on an electronic device  200 ) can help keep the electronic device  200  attached to the portable charger  10  during transport. 
     Referring to  FIGS. 10A-10E , an attachment chip  100  comprises a thin, generally flat chip or disc  102  having magnets (or metallic pieces)  122  positioned therein or thereon in a geometric arrangement in a spaced apart relationship to one another, whereby the geometric arrangement generally complements the magnetic array  22  provided on the portable charger  10 . While the various magnets  122  are depicted in the Figures herein as outwardly projecting from the chip material, such magnets  122  can be embedded within and even hidden within the chip material without departing from the spirit and principles of the present invention. In general, the presence of the magnets  122 , the projection of the magnets  122  and the thickness of the disc material are embellished slightly in the drawing figures to emphasize and highlight features of the present invention. 
     The attachment chip  100  is preferably manufactured from a thin, generally flat plastic material and includes an adhesive layer  104  or some other means of attaching the chip  100  to the back of an electronic device  200  with which the attachment system is to be used. For example, as shown in  FIG. 10D , the chip  100  has an attaching surface  106  that can connect and hold flush to the outer surface of the electronic device  200  using the adhesive layer  104  provided on said attaching surface  106 . Preferably, the chip  100  is attached to the electronic device  200 , as generally illustrated in  FIG. 11 , so that the magnetic array  122  of the chip  100  is positioned around the reception area  237  for the device  200  so that the respective magnets  22  and  122  on the portable charger  10  and the attachment chip  100  will align said reception area  237  with the transmission area  27  of the portable charger  10  without interfering with wireless transmissions from the portable charger  10 . In this regard, the chip  100  can include a central opening  124  between the magnets  122 , such as shown in  FIG. 10A , for example, to help attach the chip  100  to the electronic device  200  in a desired and predetermined location and orientation. 
     When it is desirable to wirelessly recharge the electronic device  200 , the magnets  122  on the attachment chip  100  can be aligned with the magnets  22  on the portable charger  10 , such as shown in  FIGS. 12A and 12B . When the respective magnets  22  and  122  interact, the electronic device  200  will be attached to the portable charger  10  and the complementary shapes of the respective magnetic arrays  22  and  122  will ensure proper alignment of the wireless transmission components to ensure proper and efficient wireless charging. 
       FIGS. 10A-10E  illustrate an exemplary design of an attachment chip  100  that can be used in accordance with the present invention. Various additional and alternate designs, shapes and sizes of attachment chips  100  are illustrated and described in co-pending U.S. application Ser. No. 15/802,552, filed Nov. 3, 2017, owned by Applicant and which is incorporated herein by reference in its entirety. 
     Referring again to  FIG. 3 , the portable power charger  10  also includes a second attachment means, generally designated as reference numeral  82 , on the first surface  21  of the charger housing  12 . The second attachment means  82  generally comprises an attaching surface that, when pressed against the surface of an electronic device  200 , attaches the portable charger  10  to the electronic device  200 , and vice versa, connecting the units together and allowing for hands-free carry and charge. In an embodiment of the present invention, said second attachment means  82  comprises a pressure-sensitive adhesive, or “sticky”, patch  84  which allows the portable power charger  10  to remain stuck to the electronic device  200  while charging, but allows for seamless removal when the charge is completed. The adhesive patch  84 , for example, could comprise a pad made of sticky, reusable silicone rubber. Using the illustrated adhesive patch  84 , the power charger  10  can be attached to a variety of electronic devices  200 , regardless of size and shape. 
     Referring to  FIG. 3 , the adhesive patch  84  is preferably positioned within the opening  24  of the geometric magnetic array  22 . In this regard, the adhesive patch  84  provides an alternate attachment means that is useful for electronic devices  200  that do not include the requisite magnets or metal pieces  222  needed to use the magnetic array  22  provided on the charger  10 . Still further, the adhesive patch  84  can work in conjunction with the magnets  22  on the charger  10  to secure the connection between the charger  10  and the electronic device  200 , for example, during transit so that a charging cycle is not disrupted. 
     In use, the adhesive patch  84  is pressed flat against an electronic device  200  to stick the portable power charger  10  onto the electronic device  200 . Contact of the second attachment means  82  with and against the electronic device  200  places the wireless charging transmitter  26  in close proximity to a wireless charging receiver of the electronic device  200 , enabling wireless power transfer from the portable power charger  10  to the electronic device  200  and ensuring sufficient adhesion between the units. When not in use, the adhesive patch  84  can be covered by a flap  86  so as not to interfere with use of the magnets  22 . In  FIG. 3 , the flap  86  is shown in its open condition. 
     As with known power transmission devices, the wireless transmitter of a charging device (e.g., charger  10 ) and the wireless receiver of a device to be charged (e.g., electronic device  200 ) typically must be aligned for the charge to be transferred. In this regard, the adhesive patch  84  may be positioned over the transmitter  26  of the charger  10 . As noted above, the magnetic array  22  is positioned around the adhesive patch  84  such that both attachment means  80  and  82  could work collectively to hold the electronic device  200  in place during charging. 
     In an alternative embodiment of the second attachment means  82 , the means can comprise one or more suction cups to attach the portable power charger  10  to an electronic device  200 . Examples of suction cups as an attachment means are shown and described in U.S. Pat. No. 10,418,839, which is incorporated herein by reference. Still further, the means can comprise hook-and-loop connectors attached to the portable power charger  10  and the electronic device  200 . 
     As noted, the second attachment means  82  is useful for attaching the portable charger  10  with electronic devices  200  that do not include magnets or metallic pieces  222  for interaction with a magnetic array  22  on the charger  10 . Similarly, the second attachment means  82  are useful for attaching the charger to electronic devices  200  that do not have wireless charging capability, such that the proper alignment between the charger  10  and the electronic device  200  is less important, and the main goal for attaching an electronic device  200  to the charger  10  is simply to attach the two devices together and further to maintain attachment during charge, even if by direct means. Accordingly, in alternate embodiments of the present invention, a portable power charger can be provided with just the second attachment means  82  without departing from the principles and spirit of the present invention. Such an embodiment is generally illustrated in  FIGS. 14-18  and described in more detail below. 
     In another embodiment illustrated in  FIGS. 13A-13C , a magnetic array, as described herein, can also be provided for an electronic device  200  within a protective case  300  designed for the electronic device  200 . Such a case  300  may include a magnetic array  322  formed therein, or alternatively, provided by an attachment chip  100  attached between the device  200  and the protective case  300 , whereby the magnetic array  322  on the case  300  or provided by an attachment chip  100  is located and oriented at a predetermined position relative to the reception area  237  for the electronic device  200 . Thus, when the protective case  300  is installed on the electronic device  200 , the device  200  is provided with the attachment means to effectuate proper and efficient wireless charging from the portable charger  10  when connected thereto. 
     In alternate embodiments, the magnets  222 ,  122 ,  322  on the electronic device  200 , the attachment chip  100 , or in a protective case  300 , can simply be metallic pieces that will interact with the magnet(s)  22  provided on the portable power charger  10 . 
     Referring to  FIGS. 14-18 , an alternate embodiment of a portable power charger in accordance with the present invention is illustrated and generally designated as reference numeral  410 . Like components between charger  410  and charger  10  are identified by similar reference numerals. Further, the charger  410  may include components illustrated for the charger  10  and described herein with reference to charger  10  even though such components are not expressly discussed with respect to the embodiment of charger  410 . 
     As illustrated, the charger  410  comprises a charger housing  412  having a rechargeable battery unit  414  internally disposed therein. The power charger  410  is designed for portability and convenient on-the-go use to recharge one or more mobile electronic devices and is designed to be attachable to an electronic device  200  via an attachment system comprising at least one attachment means  482  provided on a first external surface  421  of the charger housing  412 . The attachment means  482  generally comprises an attaching surface that, when pressed against the surface of an electronic device  200 , attaches the portable charger  410  to the electronic device  200 , and vice versa, connecting the units together and allowing for hands-free carry and charge. In an embodiment of the present invention, said attachment means  482  comprises a pressure-sensitive adhesive, or “sticky”, patch  484  which allows the portable power charger  410  to remain stuck to the electronic device  200  while charging, but allows for seamless removal when the charge is completed. The adhesive patch  484 , for example, could comprise a pad made of sticky, reusable silicone rubber, or suction cups, or hook-and-loop fasteners. Using the illustrated adhesive patch  484 , the power charger  410  can be attached to a variety of electronic devices  200 , regardless of size and shape. 
     Further referring to  FIG. 16 , the charger  410  includes a flap  486  that can cover the sticky patch  484  when it is not in use so that the sticky surface of the patch  484  does not attach or get stuck to other items, for example, when the charger is being carried in a bag or coat pocket.  FIG. 15  shows the flap  486  opened and exposing the sticky patch  484  for use to attach the charger  410  to an electronic device  200 .  FIG. 16  shows the flap  486  being pivoted to close the sticky patch  484  so that it can be covered and protected when not needed to attach the charger  410  to an electronic device  200 . 
     Though only one attachment means  482  is illustrated in the embodiment of  FIGS. 14-18 , the charger  410  can include the first attachment means (comprising a magnetic array such as described and shown with reference to the charger  10 ) without departing from the principles and spirit of the present invention. 
     Though not shown, the charger  410  can further include internal wireless transmission components, such as a wireless transmitter and a wireless receiver, as described above. 
     In the embodiment shown in  FIGS. 14-18 , the portable power charger  410  has the capability of charging other devices or being recharged itself via wireless transmissions or via direct connections, either using connector cables provided with and stored in the charger housing  412 , or via separate connector cables attachable to the charger  410  via power connection ports  430  and  416  provided on the charger housing  412 . In this regard, the portable charger  410  can be used on-the-go to charge one or more electronic devices  200  by various means and combinations of means. 
     Referring to  FIG. 4 , the portable power charger  10  may include a power connection input port  30  on the charger housing  12 . The power connection input port  30  is operatively connected with the internal battery  14  to provide a charge to the internal battery  14  when the power charger  10  is connected to an external power source via the power connection input port  30 . As shown, the power connection input port  30  comprises a micro-USB female interface, though the power connection input port  30  can utilize any known connection interface without departing from the principles and spirit of the present invention, including but not limited to a USB interface, a mini-USB interface, an AC-DC interface, or the like. In operation, a separate connector cable can be used to connect the power charger  10  with an external power source via the power connection input port  30 . 
     Still referring to  FIG. 4 , a power connection output port  16  may also be provided on the charger housing  12 . The power connection output port  16  is operatively connected with the internal battery  14  to provide a charge from the internal battery  14  to an electronic device  200  when the portable power charger  10  is connected to the electronic device  200  via the power connection output port  16 . As shown, the power connection output port  16  comprises a USB female interface, though the power connection output port  16  can utilize any known connection interface without departing from the principles and spirit of the present invention, including but not limited to a micro-USB interface, a mini-USB interface, an AC-DC interface, and an adjustable cartridge capable of transforming from a USB female interface to a USB male interface depending on the position of the cartridge (as shown in Applicant&#39;s U.S. Pat. No. 10,418,839 and co-pending U.S. application Ser. No. 15/802,552, both incorporated herein by reference), providing for power output or input or the like. In operation, a separate connector cable (such as one provided with the electronic device  200 ) can be used to connect the portable power charger  10  with an electronic device  200  via the power connection output port  16 . 
     Though the illustrated embodiment shows both a power connection input port  30  and a power connection output port  16 , the present invention can use either means for power input or for power output. Further, the portable power charger  10  can use a power connection port that utilize a two-way charging interface, such as described in Applicant&#39;s U.S. Pat. No. 9,973,016, incorporated herein by reference, so that the port can act as both a power input and a power output, depending on what is connected to the port. 
     Referring to  FIGS. 19-24 , an alternate embodiment of a portable power charger in accordance with the present invention is illustrated and generally designated as reference numeral  510 . Like components between charger  510  and charger  10  are identified by similar reference numerals. Further, the charger  510  may include components illustrated for the charger  10  and described herein with reference to charger  10  even though such components are not expressly discussed with respect to the embodiment of charger  510 . For example, charger  510  may include one or both of the first and second attachment means  80  and  82  described above, even though neither is expressly illustrated in  FIGS. 19-24 . As illustrated, the charger  510  preferably includes an internal magnetic array (not shown), such as described above. A sticky patch, as illustrated in  FIGS. 2-3 and 15-17  can also be provided on the external surface  521  of the charger housing  512  to facilitate attachment of the charger  510  with an electronic device  200 . 
     As illustrated in  FIGS. 23 and 24 , charger  510  includes one or more built-in power output connector cables  528  provided with the charger housing  512  for connecting the portable power charger  510  with electronic devices  200 . Each connector cable  528  is preferably stored within a respective cavity  529  formed in the charger housing  512  when not in use, and flexed out and away from and/or removed from the cavity  529  for use. Each power output connector cable  528  is operatively connected with the internal battery  514  for providing a charge to a respective electronic device  200  connected to the power charger  510  via the connector cable  528 . As illustrated, the connector cable  528  comprises a cord portion  538  and a head portion  548  having a connection interface  558  designed for engagement with an electronic device  200  or an adapter unit. 
     The cavity  529  for the connector cable  528  is preferably designed to have a complementary shape to the connector cable  528  so that the cable  528  can be stored within the general volume and footprint of the charger housing  512  when not in use (as illustrated in  FIGS. 19-22 ). In this regard, the existence of the connector cable interface  528  does not interfere with use of the portable power charger  510 , and further does not detract from the size and appearance of the charger  510 . In preferred embodiments, the connector cables  528  can be snap-fit into the cavities  529  to secure them into place. In alternate embodiments, the connector cables  528  can be secured in place within the cavities  529  by magnetic means integrated into the charger housing  512 . 
     When the power output connector cable  528  is needed for use, it can be disengaged from its cavity  529  and extended away from the charger housing  512  (as illustrated in  FIGS. 23-24 ) so that the head portion  548  and interface  558  can engage an appropriate electronic device  200  or adapter unit. The interface  558  can utilize any known connection interface without departing from the principles and spirit of the present invention. The cord portion  538  can be disengaged from the cavity  529  to flex the connector cable interface  528  outwardly from the charger housing  512 . Finger spaces (not shown) can be provided to assist the user to get a grip on the connector cable interface  528 . Alternatively, the power output connector cable  528  can be retracted within the charger housing  512  to respective non-use positions, for example, using a spring-biased retraction mechanism as is generally known in the art. 
     In embodiments of the present invention, the connector cables  528  can be connected with the internal battery  514  via a connection interface provided through the cavity  529 . In the alternative, the connector cables  528  can be designed for use with the power input and output ports  530  and  516 , such that, for use, a connector cable  528  is fully removed from its storage cavity  529  and connected between the portable power charger  510  and either an electronic device  200  in need of a charge or an external power source capable of providing a charge to the charger  510 . 
     In a preferred embodiment, as shown, the portable power charger  510  is provided with two connector cables  528 , one disposed on each side of the charger housing  512  within complementary shaped storage cavities  529  and secured by snap-fit or integrated magnetic means, or both means. Such connector cables  528  can be part of a kit of interchangeable connector cables  528 , such that a first connector cable  528  can be removed from the charger housing  512  and replaced with a different connector cable  528 , that also fits securely into the storage cavity  529 . The second cable  528  will have a different connection interface  558  such that cables  528  can be interchanged, as needed, so that the portable power charger  510  can be used with a variety of electronic devices  200  with varying connection requirements. For example, the kit of the portable power charger  510  can include a first connector cable  528  having a USB interface and a micro-USB interface; a second connector cable  528  having a USB interface and an Apple Lightning™ interface; a third connector cable  528  having a USB interface and a USB-C interface; and a fourth connector cable  528  having dual USB-C interfaces. For the embodiment shown in  FIGS. 19-24 , two of these four connector cables  528  can be provided on the charger  510 , while the remaining cables  528  can be switched in, as desired. 
     The charger  510  can also be provided with a direct power input connection, such as a plug  590  provided on the charger housing  512  and in operative communication with the internal battery  514 . As illustrated, the plug  590  can be pivotable between an extended use condition and a retracted storage condition. When extended, the plug  590  can be plugged into a standard power outlet to provide a charge to the internal battery  514  for recharging. When not needed, the plug  590  can be pivoted to its retracted condition within a cavity  592  formed in the charger housing  512 . 
     Though not shown, the charger  510  can further include internal wireless transmission components, such as a wireless transmitter and a wireless receiver, as described above. 
     In the embodiment shown in  FIGS. 19-24 , the portable power charger  510  has the capability of charging other devices or being recharged itself via wireless transmissions or via direct connections, either using the connector cables  528  provided with and stored in the charger housing  512 , or via separate connector cables attachable to the charger  510  via power connection ports  530  and  516  provided on the charger housing  512 . In this regard, the portable charger  510  can be used on-the-go to charge one or more electronic devices  200  by various means and combinations of means. 
     An alternate design for a portable power charger  510  with interchangeable connector cables  528  storable in cavities  529  formed in the charger housing  512  is illustrated in  FIG. 25 . 
     Referring to  FIGS. 26-35 , an alternate embodiment of a portable power charger in accordance with the present invention is illustrated and generally designated as reference numeral  610 . Like components between charger  610  and the other chargers  10 ,  410  and  510  described herein are identified by similar reference numerals. Further, the charger  610  may include components illustrated for the other chargers and described herein with reference to chargers  10 ,  410 , and  510  even though such components are not expressly discussed with respect to the embodiment of charger  610 . For example, charger  610  may include one or both of the first and second attachment means  80  and  82  described above. As illustrated, the charger  610  preferably includes an internal magnetic array (not shown), such as described above, designed to receive, position and attach an electronic device  200  to the portable power charger  610  for wireless charger. Attachment of the electronic device  200  using the first attachment means is illustrated in  FIGS. 28-29 . Second attachment means, generally designated as reference numeral  682 , can also be provided on the side walls of the charger housing  612 , as illustrated in  FIGS. 26 and 27 , to facilitate attachment of the charger  610  with an electronic device  200  using adapter means described in more detail below. 
     As illustrated, the charger  610  comprises a charger housing  612  having a rechargeable battery unit (not shown) internally disposed therein. The power charger  610  is designed for portability and convenient on-the-go use to recharge one or more mobile electronic devices and is designed to be attachable to an electronic device  200  via an attachment system comprising at least one attachment means  682  provided on the charger housing  612  and adapter means configured to position and hold the electronic device  200  in place relative to the portable power charger  610 . Referring to  FIGS. 26 and 27 , the second attachment means  682  generally comprises grooves  684  formed in each of the side walls  685  of the charger housing  612 . The grooves are configured to receive complementary projections or ribs  284  formed in an adapter designed to be attached to the portable power charger  610 . For example, as illustrated in FIGS.  30 - 31 , a cradle adapter  280  includes inwardly directed side projections  284  such that the portable power charger  610  can slide onto and be held by the cradle adapter  280 . Similarly, referring to  FIGS. 33-34 , a device mounting adapter  281  includes inwardly directed side projections  284 ′ such that the mounting device adapter  281  can slide onto and be held by the portable power charger  610  when the projection  284 ′ engage the grooves  684 . Thereafter, an electronic device  200  can be “attached” to the portable power charger  610  by sliding the electronic device  200  into secondary grooves  285 ′ formed into the device mounting adapter  281 , as illustrated in  FIG. 35 , allowing for hands-free carry and charge. As illustrated, the cradle adapter  280  and the device mounting adapter  281  can be connected to the portable power charger  610  at the same time. 
     Though the second attachment means  482  are illustrated in the embodiment of  FIGS. 26-35  in the form of grooves  684  formed in the side of the charger housing  612 , the charger  610  can include these attachment means in form of projections or ribs projecting outwardly from the side walls  685  without departing from the principles and spirit of the present invention. In such an alternate design, the adapters that can be attached to the portable power charger  610  use complementary means for such engagement and attachment. Thus, as described above for the embodiments illustrated in  FIGS. 26-35 , the adapters include projections  284  and  284 ′ that complement the shapes of the grooves  684  for secure engagement between the portable power charger  610  and the adapters  280  and  281 . Where the portable power charger  610  utilizes projections, the adapters will use complementary grooves for secure engagement between the portable power charger  610  and the adapters  280  and  281  without departing from the spirit and principles of the present invention. 
     Additionally, the portable power charger  610  is attachable to an electronic device  200  via the second attachment means  682 , beneficial, for example, in connecting an electronic device  200  to the portable power charger  610  when said device  200  does not have the means to magnetically connect to the power charger  610  using the first attachment means  680 . In an embodiment of the present invention, the second attachment means  682  comprises grooves  684  formed into the sides of the charger housing  612 , or projections or ribs projecting out from the sides of the charger housing  612 , that interact and engage complementary shaped projections or ribs on the one hand, or grooves on the other hand, formed into an adapter configured to be mounted onto the charger  610  and hold an electronic device  200  in place adjacent to the charger  610 , and more preferably hold said device  200  in an aligned position optimal for wireless charging from the charger  610  to the device  200 . 
     As illustrated in  FIGS. 30-32 , the adapter attachable to the portable power charger  610  may comprise a cradle or docking station  280  for the portable power charger  610 , and when the charger is attached to the cradle or docking station  280  via the second attachment means  682 , the portable power charger  610  can be charged itself through the cradle or docking station  280 , or mounted to a desk or in a car using the cradle or docking station (such as illustrated in  FIG. 32 . For example, the portable power charger  610  may be charged through a direct connection to the cradle or docking station  280 , such as via a USB interface  290  that engages a power input port  630  on the portable power charger  610 . In the alternative, the portable power charger  610  may be charged through wireless charging means, such as via a wireless connection between a wireless transmitter in the cradle or docking station  280  and a wireless receiver (not shown) in the portable power charger  610 . Still further, the portable power charger  610  can be recharged using solar panels associated with the cradle or docking station  280 . 
     Referring to  FIG. 32 , when the portable power charger  610  is attached to the cradle adapter  280  using the second attachment means  682 , the first attachment means  680  (with magnetic components) can be used to charge an electronic device  200  attached to the first surface  621  of the charger housing  612 . 
     In accordance with an aspect of the present invention, the portable power charger  610  can be used to charge an electronic device  200  when said device does not have the means to magnetically connect to the power charger  610  using the first attachment means  680 . For example, the electronic device  200  can be attachable to the portable power charger  610  using a device mounting adapter  281  configured for connection to the portable power charger  610  via the second attachment means  682 , as illustrated in  FIGS. 33-35 . As noted above, the device mounting adapter  281  is attached to the portable power charger  610 , and then an electronic device can be positioned in the device mounting adapter  281  using secondary grooves  285 ′ configured to receive the electronic device  200 . Indeed,  FIG. 35  shows the mounting device adapter  281  attached to the portable power charger  610 , and an electronic device  200  held by the device mounting adapter  281  in an optimal position proximate to the portable power charger  610  for wireless charging. When the electronic device  200  is so positioned in the device mounting adapter  281 , the device  200  is aligned with the portable power charger  610  for optimal wireless charging. If the electronic device  200  does not have wireless charging capabilities, the electronic device  200  can still be charged from the portable power charger  610  using direct connection means, such as using a power charging cable. 
     In further alternate aspects of the present invention, multiple adapters may be used simultaneously, and connected to the portable power charger  610 , each using the second attachment means  682 . For example, the portable power charger  610  can be attached to a first adapter, such as a cradle or docking station  280 . Thereafter, a second adapter, such a device mounting adapter  281 , can be attached to the charger  610 , again using the second attachment means  682 , whereby the second adapter  281  provides a means for mechanically positioning an electronic device  200 , such as a phone, in proximate relationship to the portable charger for charger purposes. This set-up—with both the cradle adapter  280  and the device mounting adapter  281  connected to the portable power charger using the second attachment means  682  described herein—is generally illustrated in  FIG. 35 . 
     In yet a further aspect of the present invention, the second attachment means  682  can be used to position a portable power charger  610  in proximate relationship to an electronic device  200  for charging in connection with a protective case  300  that slides around the portable charger  610  and the electronic device  200  and maintains the relative position of the two devices during charging, as well as during storage and/or transport (i.e., when the two are being collectively carried in a bag, purse or briefcase). An exemplary protective case for this purpose is illustrated in  FIG. 36  and generally designated as reference numeral  300 ′. As so illustrated, the protective case includes internal projections  384 ′ that project inwardly and are configured for engagement with the grooves  684  formed in the portable power charger  610 . The protective case  300 ′ further includes secondary grooves  385 ′ that receive and position an electronic device  200  relative to the portable power charger  610 . The protective case  300 ′ with both the portable power charger  610  and the electronic device positioned as intended is illustrated in  FIG. 37 . 
     Though not shown, the charger  610  can further include internal wireless transmission components, such as a wireless transmitter and a wireless receiver, as described above. 
     In the embodiment shown in  FIGS. 26-35 , the portable power charger  410  has the capability of charging other devices or being recharged itself via wireless transmissions or via direct connections, either using connector cables provided with and stored in the charger housing  612 , or via separate connector cables attachable to the charger  610  via power connection ports  630  and  616  provided on the charger housing  612 . In this regard, the portable charger  610  can be used on-the-go to charge one or more electronic devices  200  by various means and combinations of means. 
     In preferred embodiments of the present invention, power capacity means  20  are also provided to indicate the capacity of the internal battery unit  14 . In an embodiment of the present invention, a portion of the charger housing  12  is made of a translucent material and has one or more LED lights disposed behind it. Thus, the power capacity indication is provided by the LED light illuminating is different colors corresponding to different charge levels—e.g., green when the battery is mostly charged; yellow when the charge is reduced by at least more than half; and red when the charge level is low and the battery  14  is in need of a recharge. 
     An additional LED light can be provided so as to provide a flashlight feature, general designated as reference numeral  533 . As illustrated in  FIG. 25 , a dedicated power button  534  can be provided for manual operation of the flashlight feature  533 . When turned on, the face of the charger can light up. 
     As noted, a wireless receiver  36  can also be provided in the charger  10 . In operation, placing the charger  10  on a wireless transmission device, such as a wireless charging mat, so that the receiver  36  aligns with a transmitter in the wireless transmission device will recharge the internal battery  14  via a wireless connection. A receiver  36  generally comprises a magnetic induction coil operatively connected to the internal battery  14 , as generally illustrated in  FIG. 6 . Though schematically illustrated as side-by-side in  FIG. 6 , this representation of the transmitter  26  and receiver  36  is merely provided for illustration purposes and in practice, the transmitter  26  is generally in line with the receiver  36  so that the transmission area  27  and the reception area for the charger  10  are generally centered within the charger housing  12 . 
     The wireless charging capabilities of the portable power charger  10  in accordance with the present invention are beneficial in that they improve upon the convenience provided by wireless charging technology. For example, a portable electronic device  200  can be recharged on-the-go even when the proper charging connector cable is not available. Indeed, the compact and portable design of the portable power charger  10  can permit charging of an electronic device  200  in the user&#39;s pocket or purse simply by attaching the portable power charger  10  to the electronic device  200  or an electronic device protective case  300  for said device  200 , and ensuring that the electronic device  200  is properly aligned with and proximate to the portable power charger  10 . Additionally, once the portable power charger  10  is charged, a portable electronic device  200  can be recharged without needing to be near an external power source, such as a wall socket, a car charger socket, an airplane charger socket, or a computer, which may not be readily available. 
     Operation of the portable power charger  10  to transmit a charge to an electronic device  200  via direct connection means or via wireless transmission means may be controlled by a power interface  18 , such as an on/off button, as shown in  FIGS. 4, 18, 21 and 25 . 
     In preferred embodiments of the present invention, the portable power charger  10  can be automatically turned on when an electronic device  200  is connected to the portable power charger  10  via a power connector cable interface  28  or a power connection port interface  16  or wirelessly. Further, the power charger  10  can use a power-off logic that automatically turns the charger  10  off after a pre-designated time period, provided certain criteria have been met. Such a protocol is described in Applicant&#39;s U.S. Pat. No. 9,973,016, which is incorporated herein by reference, whereby the portable power charger  10  will automatically turn off after a predefined time delay after it is determined that the internal battery of all electronic devices connected to the portable power charger  10  are fully charged. 
     In operation, a portable power charger  10  in accordance with the present invention can be used in a variety of manners for recharging the power charger  10  itself, as well as for recharging portable electronic devices  200 . As a result of the compact size of the portable power charger  10  and the capacity of the built-in power bank, the portable power charger  10  can be used on-the-go to recharge a variety of electronic devices, including but not limited to smart phones, mobile phones, data tablets, music players, cameras, camcorders, gaming units, e-books, Bluetooth® headsets and earpieces, GPS devices, and the like, either individually or simultaneously in various combinations. 
     In preferred embodiments, the rechargeable battery  14  is preferably a Lithium-Ion battery that can be recharged by connecting the portable power charger  10  to an external power source, such as a computer, a wall socket, a car or an airplane power supply, or to a wireless power transmission device, such as a wireless charging mat. The rechargeable battery  14  is disposed within the charger housing  12  and is operatively connected with any and all input and output connector cable interfaces, input and output connector port interfaces, and any and all wireless receivers and wireless transmitters for receiving a charge from an external power source and transmitting a charge to one or more electronic devices connected to the portable power charger  10 , either wirelessly or through power output means. 
     The charger housing  12  encloses various electrical components (such as integrated circuit chips and other circuitry) to provide computing operations for the device. The integrated circuitry and other components may comprise a power supply (e.g., the internal rechargeable battery), a microprocessor and controller (e.g., a CPU), memory (e.g., ROM, RAM, flash), a circuit board, a hard drive, and/or various input/output (I/O) support circuitry. The electrical components may also include components for sending and receiving data and media (e.g., antenna, receiver, transmitter, transceiver, etc.), in addition to wireless transmission of power. 
     The foregoing description of embodiments of the present invention has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the invention to the form disclosed. Obvious modifications and variations are possible in light of the above disclosure. The embodiments described were chosen to best illustrate the principles of the invention and practical applications thereof to enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as suited to the particular use contemplated.