Specifications: Battery type: Lithium-Polymer Battery Capacity: 1250mAh Output Voltage: DC 5-Volt Output Current: 500mA Input Current: 300-600mA Weight: 2.1-Ounce (60g) Size: 4 by 2 by .4-Inch (103 by 50 by 11 mm) USB cable for charging and discharging Charge time: 3-4 hours by USB Standard adapters: Micro USB, Mini USB, and Apple.