... 6600mAh Micro usb portable battery charger SpecificationBattery typeLithium-ion polymer batteryTypeExternal battery 500cycles rechargeable batteryModel numberTF0019Dimension115. ... .75HAudio playback49.5HFunction Powerful energyExcellent Lithium-ion Polymer Battery work with iPhone4.3G,3GS,iPod LG, ... lifeAfter more than 500times’charging and discharging, battery capacity is still above 80%Human-oriented ...