Abstract:
The standby battery assembly for use on the portable electronic products is attached to their back or an adequate place. The battery assembly has a casing for housing a plurality of batteries ( two batteries or more). The batteries are exchangeable within the casing, with a selection switch to shift between two batteries, or two batteries are arranged in the  180 ° direction, reversed direction or same direction to couple with the flexible operation of the portable electronic products.

Description:
BACKGROUND OF INVENTION  
         [0001]    The so-called portable electronic products are implying the cell phone set, the radio walkie-talkie, the notebook PC, PDA and the re-charger base board which is outfitted with a main battery on their back or at the appropriate place. The major shortcoming the main battery inheres is that when the end-users are out of the house or of the car, if the main battery runs out the power, there is no way to find a similar model of the standby battery for replacement. This dilemma therefore renders the portable electronic product useless and the communication disrupted, and brings forth the greatest impairment and inconvenience to the end-users.  
           [0002]    Even though some end-users are considering the purchase of a spare battery in the same model. However, in the majority of the cases, they are often too busy to bring it with them when going out. When the main battery is out of power, the stand-by is found not available, the regret is still there for the disruption of communication and out of power. The dilemma remains forever.  
         SUMMARY OF THE INVENTION  
         [0003]    A stand-by battery assembly for the portable electronic products is especially designed to outfit on the back of the portable electronic products or at an appropriate place which is characterized on that the stand-by battery assembly has a casing which houses a plurality of batteries. One of which acts as the main battery. When the main battery is exhausted, the other battery will take the place from time to time to maintain the uninterrupted operation of the portable electronic products and to give a buffer time for the end-user to recharge the main battery. The stand-by battery assembly is usually attached to the portable electronic products, easy for the end-user to replace the exhausted main battery. 
       
    
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0004]    [0004]FIG. 1 shows the stereo disassembly of the battery assembly of the invention and the cell phone set.  
         [0005]    [0005]FIG. 2 shows the stereo assembly of the battery assembly of the invention and the cell phone set.  
         [0006]    [0006]FIG. 3 shows the stereo disassembly of the battery assembly of the invention and the cell phone set.  
         [0007]    [0007]FIG. 4 shows the stereo disassembly of the battery assembly of the invention and the cell phone set.  
         [0008]    [0008]FIG. 5 is a schematic diagram showing the stereo assembly of the battery assembly of the invention and the cell phone set.  
         [0009]    [0009]FIG. 6 shows the circuit diagrams for the FIGS. 4 and 5.  
         [0010]    [0010]FIG. 7 shows another preferable embodiment of the battery assembly of the invention,  
         [0011]    [0011]FIG. 8 shows the stereo disassembly of the battery assembly of the invention and the cell phone set as shown in the FIG. 7.  
         [0012]    [0012]FIG. 9 shows the stereo assembly of the battery assembly of the invention and the cell phone set as shown in the FIG. 7.  
         [0013]    [0013]FIG. 10 shows another preferable stereo embodiment of the battery assembly of the invention.  
         [0014]    [0014]FIG. 11 shows another preferable stereo embodiment of the battery assembly of the invention.  
         [0015]    [0015]FIG. 12 shows another preferable stereo embodiment of the battery assembly of the invention.  
         [0016]    [0016]FIG. 13 shows another preferable stereo embodiment of the battery assembly of the invention.  
         [0017]    [0017]FIG. 14 shows another stereo assembly of the battery assembly of the invention mounted on the cell phone set.  
         [0018]    [0018]FIG. 15 shows the stereo assembly of the battery assembly of the invention outfitted on the radio walkie-talkie.  
         [0019]    [0019]FIG. 16 shows stereo assembly of the battery assembly of the invention mounted on the notebook PC.  
         [0020]    [0020]FIG. 17 shows stereo assembly of the battery assembly of the invention mounted on the PDA.  
         [0021]    [0021]FIG. 18 shows stereo assembly of the battery assembly of the invention mounted on the charger set.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0022]    The stand-by battery assembly of the invention is applicable to a variety of portable electronic products, namely: the cell phone set, the radio walkie-talkie, the notebook PC and PDA. For simplicity, the cell phone set is employed as the major sample for explanation.  
         [0023]    [0023]FIG. 1 shows the stereo disassembly of the battery assembly of the invention and the cell phone set, where it consists of a cell phone set  10  and a stand-by battery assembly  20  attached to the back of the cell phone set. On the back of the cell phone set, there provides a recess  11  with sufficient space to receive the stand-up battery assembly  20  which comprises a casing  21  and two batteries  22 ,  23  housed in the casing  21 . There is an upper fastening buckle  211  and a lower fastening buckle  212  on the casing  21 . The casing  21  has two slots  213  for accommodating the strong batteries  22  and  23 . Each battery is provided with two metal contacts  221  and  231  for supplying power to the cell phone set  10 . When the cell phone set  10  and the stand-by battery assembly  20  are combined together, they are looked as shown in the FIG. 2.  
         [0024]    [0024]FIG. 2 shows the stereo assembly of the battery assembly of the invention and the cell phone set. Where the recess  11  of the cell phone set furnishes two conductive contacts  12 . When the upper fastening buckles  211  and the lower fastening buckle  212  on the casing  20  are forced to insert into the upper notch  101  and the lower notch  102  on the cell phone set  10 , so the cell phone set  10  and the stand-by battery assembly  20  are integrated, the two conductive contacts  12  will make an intimate contact to the contacts  221  on the battery  22 . When the power of the battery  22  is worn out, the battery  23  will take the place of the battery  22  for continued operation of the cell phone set  10 . After the battery  2  is retired from operation, it shall be recharged at an adequate time by the end-user to make it ready for replacing the battery  23  when it runs out of power.  
         [0025]    [0025]FIG. 4 is another preferable embodiment of assembled standby battery assembly and the cell phone set where the battery assembly  20  differs from the above structure. A circuit board  24  is fixed on the casing  21  with two set of four metal strips  241 ,  242 , contacting with the metal connectors  221  and  231  of each battery respectively. Two metal strips extend outside the casing top to link with the contact  12  (see FIG.5) of the cell phone set  10 . From the FIG. 5, there provides a selection switch  25  mounted on the back of the casing  21  which determines which battery will be put into operation. In case that the battery  22  runs out of power, it is convenient for the selection switch  25  to shifts to the battery  23  for power supply.  
         [0026]    [0026]FIG. 7 shows another embodiment of the standby battery assembly  20 , comprising two batteries  22  and  23  arranged in reversed position in which the metal contacts  221  and  231  are arranged differently. Taking battery  22  as an example, two metal contacts  221  are placed at the lower end of the batter  22 , and two metal contacts  231  are placed at the top end of the battery  23 . The casing  21  has the upper and lower fastening buckles  211  and  212 , correspondingly, the cell phones set has the upper and lower fastening slots  101  and  102 , holding the two buckles  211  and  212  perfectly. In FIG. 8, the two metal strips  231  of the battery  23  in the battery assembly are connected to the conductive contact  12  of the cell phone set  10 . After the battery  23  is exhausted, taking off the battery assembly, turning it 180° and installing it back to the cell phone set  10 , now the battery  22  is now supplying the power to the cell phone set  10 .  
         [0027]    The number of battery housed in the battery assembly is changeable. As shown in the FIG. 10, the casing  21  contains four pieces of batteries,  22 ,  23 ,  22 ′ and  23 ′. The batteries can be either vertically or horizontally arranged. As shown in the FIG. 11, two batteries  22 ,  23  are horizontally arranged in the casing  21 . The casing  21  can be made a recess either with four side seals or with one end open as shown in the FIG. 12 provided with a crop-up margin  213  to prevent the battery slipping out. In the FIG. 13, the batteries  22  and  23  are in the opposite arrangement housed in the casing  21  of the battery assembly  20 , and their metal terminals  221  and  231  are extending outward. The FIG. 14 shows a battery assembly  20  with no casing  21 , barely two batteries  22  and  23  hooked up to the cell phone set  10 . Under such a circumstance, the cell phone set has two sets of the upper and lower fastening notches  101 ,  102  which couple with the upper and lower fastening buckles  222 ,  223 ,  232 , and  233 . It is understandable that the battery assembly of the invention varies in great extent.  
         [0028]    Similarly, the battery assembly is also applicable to other portable electronic product, such as the stereo assembly of the standby battery assembly and the radio walkie-talkie as shown in the FIG. 15 where the battery assembly containing two batteries  22  and  23  is directly inserted into the recess  31  of the radio walkie-talkie  30 , or using a casing (not shown) with two batteries  22  and  23  to be inserted in the recess  31  of the radio walkie-talkie.  
         [0029]    Similarly, the battery assembly  20  is inserted in the recess  41  of the notebook PC  40  as shown in the FIG. 16, the battery assembly  20  in the recess  51  of the PDA  50  as shown in the FIG. 17, and the battery assembly  20  in the recess  61  of the charger board  60  as shown in the FIG. 18. In short, the battery assembly of the invention is suitable for use on a variety of portable electronic products.  
         [0030]    The major achievements the invention has attained are:  
         [0031]    (1) When the battery of the portable electronic product runs short of power supply, the standby battery assembly can resume the operation immediately, avoiding communication disruption or power outage.  
         [0032]    (2) The battery assembly reminds of the end users to recharge the exhausted battery from time to time and give sufficient buffer time for the end sue to recharge the batter,  
         [0033]    (3) The battery assembly is ready for use with the portable electronic product without modification.  
         [0034]    (4) The battery assembly is easy to bring with the portable electronic product, solving the emergent need.  
         [0035]    (5) The life span of the battery is limited, declining day after day. The battery assembly provides two batteries with varying life spans, at least the worry for power shortage in operating the portable electronic products is therefore alleviated.