External backup battery for iPhone4 and iPhone 4s

external power 1,Battery Case for iPhone 4G 2.Both for CDMA and GSM 3.The thinnest power pack for iPhone4 ,Only 15.8mm

 External backup battery for iPhone4  specifications

Size	around w60*l125*H14mm
Weight	around 60g
Type	li-polymer battery
Battery Capacity	1600mAH
Cycling times	around 500times
Working current	3.7v-4.2v
Charging voltage	around 4h
Charging voltage	DC5V±0.5V
Output voltage	DC5V±0.25V
Output current	500mA
Input manner	Standard micro USB port
Battery display manner	Blue LED
Packing content	prodct*1,specific USB cable*1,

About the switch:

after putting iphone4 in the product, the product will automatically charge iphone4,you may press the switch for 2 seconds to stop charging.in the above condition, you may press the switch for 2 seconds to continue charging process.under charging status. respective LED indicator will light up ,which represents the battery status of the product, see LED indicator description for details.the product will be in standby status if iphone4s is not placed in the product and USB cable is not connected.when the iphon4is not placed in the product and the USB cable is not connected ,press the switch for 2seconds,respective LED indicator will light up ,which will automatically extinguish around 30seconds later, and the product will turn into standby status.

Charging iphone4 with the product:

when putting iphon4 into the product, it will automatically start the charging process for iphon4,whether or not the USB cable is connected.after starting the charging process ,the battery indicator in the right top side of iphone4 will show the charging status.during the charging process, you may press the switch for 2 seconds to stop the charging process, subsequently you may press 2 seconds more to restore the charging process.if the iphon4 battery is used up and you charge iphone4 with the product ,you will have to wait for 0m after charging process is tuned to the iphone4.

Charging the product and iphon4 with USB power souree:

1.put iphon4 into the product as mentioned above, insert the USB connector of the attached USB cable into the product, nd insert the other end of USB cable into USB port of computer etc, the charging process will begin.

2.under the about charging status, espective led indicators of the product will light up.

3.ring the charging process ,press the switch for 2 seconds, t will turn into the charging process for the product, f you press the switch for 2 seconds again t will turn into charging process for iphon4.

4.during the charging process ,take out the iphon4,it will charge the product instead.

5.if iphone4 is already fully charged ,the outside power source will automatically turn into the charging process for the product, t which time the respective led indicator will light up ,but the charging process is turned into for the product.

Payment:

 We accept Alipay, Western Union, T/T and credit card, all the payment should through Escrow.

 The goods will be arranged onece we confirm the payment.

Contact US :

 1. If you have any othere questions about our products, services:

 2.you can leave us a message through alibaba.

 3. you can send us E-mail or contact us with trademanager.

4.We will reply you within 12 hours, thanks

External backup battery for iPhone4 and iPhone 4s