External backup Battery Charger Case

portable charger for iphone4 1,Battery Case for iPhone 4G 2.Both for CDMA and GSM 3.The thinnest power pack for iPhone4 ,On

for iphone 4s battery case   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,

There is an interface in backup battery. Insert the phone down the chute till match the interface completely, and then you can start the cell phone charge and also use it as a battery directly. There is a space for camera outside, so the entertainment function of the mobile phone wont be affected. There is a slide switch and a USB interface on the top. The role of the slide switch is to start or stop a backup battery charging iPhone. And the function of the USB interface is to charge the backup battery and iPhone at the same time via the data.transmission, and also you can read the photos that you have taken in the camera.There is a round switch and four LED lights. The round switch is to check the power of the backup battery. Press the round switch lightly, and then the LED will shine. All four LED shining shows that power is enough. On the contrary, the backup battery needs charging. LED will shine in the charging process, and they will get more and more bright from the charging beginning to the charge end.

Parameter of the backup battery/portable power pack for iPhone 3G :

External backup Battery Charger Case