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phone backup 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 :
Black Portable External Power backup battery Charger Case for iPhone 4 4s 1600mAh