battery case for iPhone 4/4s
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Weight:70g
Capacity:1700mAh
Cell type:Li-polymer battery
Dimension:126*62*17.6mm
Output voltage:5V/500mA
1.Preserve the signal
2.Data Sync function
3.Protective and Powerful
4.Smart power management
5. different color:red/black/white
6. 4 LED power indication