rechargeable battery case charge mobile for iphone 4/4s 1,Emergency power for iPhone4/4s 2,Capacity:1800mAh 3,PU case

Features/specifications:

1. Backup power for iphone42. Lithium Polymer Capacity:1800mAh3. Output: 5V/500mA/h   Input:5V 50mA/h5. Material: PU6:Hi-tech, A-grade lithium polymer battery that can recycling for more than 500times. Built in overcharge, short circuit and temperature protection. No memory effect. Charge your device smartly.7:To check the power level of the battery case, just push the button and the LEDs will indicate the status clearly.8:Long push the button to turn the charging on or off. So you can control the battery case to charge the iPhone or not. 

 

 

backup battery for iphone4 4s with best price