Spec: Specifications: Battery type: Lithium-Polymer Battery Capacity: 3500mAh Solar Panel: Monocrystalline Silicon Maximum Solar Power Generation: 0.5-Watt Output Voltage: DC 5-Volt Output Current: 500mA Input Current: 700mA Weight: 2.1-Ounce (60g) Size: 4.3 by 2.5 by .5-Inch (110 by 63 by 12.5 mm) USB cable for charging and discharging Charge time: less than 7 hours by USB Standard adapters: Micro USB, Mini USB, and Apple.