Description:

 1900mAh back cover Battery case for Iphone4G

Specification:

Weight:65g

Capacity:1900mAh

Cell type:Lithium-ion polymer

Dimension:125*63*17.5mm

Output voltage:5V

Output current:500mA

Cycle life:500 times

Function & charger:

Enhance Iphone 4 signal

Power check & indication:Power switch

Sync to itunes

Signature:

Standby time:up to 230 hours

Talk time:up to 6 hours

Internet use:up to 5.5H on 3G network

                     upto 8H on Wifi

Audio playback:up to 30 hours

Video playback:up to 8 hours

Steps:

1.Slot in Iphone

2.Switch on button on battery bottom

3.Close the roof cover