Patent Abstract:
An attachable battery pack having a battery body with a pivoted clamp for detachably fastening to one end of an intelligent cell phone (iPhone or Google phone) as a spare battery. The battery body is configured to overlay the display screen of the intelligent cell phone to provide protection for the display screen and includes a charging circuit and connector for charging the built-in battery of the intelligent cell phone.

Full Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to battery packs and more particularly, to an attachable battery pack detachably connectable to an intelligent cell phone (such as, iPhone or Google phone) for use a spare battery and screen protector. 
     2. Description of the Related Art 
     Regular cell phones allow replacement of the rechargeable battery. However, certain single-piece commercial intelligent cell phones (such as, APPLE-iPhone or Google phone) do not allow replacement of the built-in rechargeable battery. When it is necessary to repair or replace the built-in rechargeable battery of an intelligent cell phone of this kind, the user must send to the intelligent cell phone to the distributor for repair or replacement by a technician. Further, when the power of the built-in rechargeable battery of an intelligent cell phone of this kind is used up and no any external power source is available, the intelligent cell phone becomes operable. Further, due to a single piece design, the screen of an intelligent cell phone of this kind tends to be scratched accidentally. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide an attachable battery pack, which is attachable to an intelligent cell phone for use as a spare battery. It is another object of the present invention to provide an attachable battery pack, which is attachable to an intelligent cell phone for screen protection. 
     To achieve these and other objects of the present invention, an attachable battery pack comprises a body having a static flocking fabric cover face on its one side and a genuine leather covering on its other side, a clamp pivotally connected to one end of the body for detachably fastening to an intelligent cell phone for enabling the body to be closed on the screen of the intelligent cell phone or opened from the intelligent cell phone, an electrical connector, which is connected to the power jack of the intelligent cell phone after clamping of the clamp on one end of the intelligent cell phone, a power switch for charging control and an indicator light for charging indication. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an elevational view of a commercial intelligent cell phone. 
         FIG. 2  is an oblique elevation of an attachable battery pack in accordance with the present invention. 
         FIG. 3  corresponds to  FIG. 2  when viewed from another angle. 
         FIG. 4  is a schematic drawing of the present invention, illustrating the attachable battery pack attached to an intelligent cell phone. 
         FIG. 5  corresponds to  FIG. 5 , illustrating the attachable battery pack closed on the intelligent cell phone. 
         FIG. 6  is a schematic sectional view of a part of  FIG. 5 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1 , an intelligent cell phone  10  (for example, APPLE-iPhone) is a single-piece member having a built-in rechargeable battery (not shown) that is not detachable and a power jack  11  located on one side thereof (for example, the bottom side) for the connection of a charging cable to charge the built-in rechargeable battery with an external power source. 
     Referring to  FIGS. 2 and 3 , an attachable battery pack  20  is shown attachable to an intelligent cell phone  10 . The attachable battery pack  20  comprises a flat body  29  configured for use as a screen cover for the intelligent cell phone  10 . The body  29  has built therein a high-quality, charging and discharging Li-polymer battery cell and a charging circuit (this arrangement is of the known art and not within the scope of the invention), a static flocking fabric cover face  24  covered over the inner side thereof (the side to be covered on the screen of the intelligent cell phone  10 ) by means of static flocking technology for protecting the screen of the intelligent cell phone  10 , a genuine leather covering  28  covered over the outer side thereof (see  FIG. 5 ) to exhibit an image of noble and high level. 
     The attachable battery pack  20  further comprises a clamp  21  pivotally connected to one end of the body  29 , an electrical connector  22  located on the clamp  21  and electrically connected to the Li-polymer battery cell and the charging circuit in the body  29 , and a springy hook  23  extended from the other end of the body  29 . 
     The attachable battery pack  20  further comprises a power switch  25  located on one lateral side of the body  29 , a power jack  27  and an indicator light  26  located on the other lateral side of the body  29 . The power jack  27  is configured subject to the specification of the power jack  11  of the intelligent cell phone  10 . The indicator light  26  is for visual charging indication. 
     Referring to  FIGS. 4 and 5 , when using the intelligent cell phone  10  with the attachable battery pack  20 , attach the attachable battery pack  20  to the intelligent cell phone  10  by clamping the clamp  21  to one end of the intelligent cell phone  10  and electrically connecting the electrical connector  22  to the power jack  11  of the intelligent cell phone  10 . After connection of the clamp  21  to one end of the intelligent cell phone  10 , the user can bias the body  29  relative to the intelligent cell phone  10  between a close position (see  FIGS. 5 and 6 ) where the springy hook  23  is hooked on the other end of the intelligent cell phone  10  and the body  29  is covered on the screen of the intelligent cell phone  10  and an open position (see  FIG. 4 ) where the springy hook  23  is disengaged from the intelligent cell phone  10  for enabling the user to operate the intelligent cell phone  10 . 
     Further, the user can switch on/off the power switch  25 . When the power switch  25  is in the “ON” position, the built-in rechargeable battery of the intelligent cell phone  10  is charged with the attachable battery pack  20  or an external power source that is electrically connected to the power jack  27 , and at the same time the indicator light  26  is turned on to give a visual indication signal. When the power switch  25  is in the “OFF” position, the attachable battery pack  20  is electrically disconnected from the intelligent cell phone  10 . 
     Further, the user can use the mating charging cable (or battery charger) of the intelligent cell phone  10  and electrically connect the mating charging cable (or battery charger) to the power jack  27  of the body  29  to charge the Li-polymer battery cell of the body  29  of the attachable battery pack  20  with AC power supply (city power supply). During charging, the indicator light  26  is turned on to give a visual indication signal. 
     Further, it is to be understood that the attachable battery pack  20  can be selectively configured to fit the length, width and thickness of any of a variety of commercial intelligent cell phones. 
     Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.

Technology Classification (CPC): 6