Specification :
Ultra-Slim : 15 mm thickness.The thinnest back-up iPhone 4 battery in the world Supply power to iPhone 4, but not charging to the battery, won' t effect the original battery life.
Extend the talking time for iPhone 4: 7h Online time: 3Ge5h, 2Ge8.6h Music playing: e37h Video playing: e16h Charging time: 3~ 4 hours
Battery cell: Li-polymer
Battery capacity: 1500mAh
Input voltage/ current of micro USB port: 5V/ 550mA
Output voltage/ current: 5V/ 500mA
Weight: 49g
Dimension: 125.8* 61.6* 15 mm
Low Consumption, High efficient of 95% .
Apple certification â Made for iPhoneâ .
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