A powerful solar battery charger with an internal 2000 mAh Li-ion battery using solar energy or power from a USB port. It has a unique “soft feel” rubberized case with LED power capacity display and flashlight. It has a nice power indication bar(4 blue LED to be on one by one). Feature & Functions:1,Solar panel (Mono or multi - crystalline):5.5v /100mA2,USB charging cable : 5v 500mA (current limited)3,Constant voltage:4.2V(to save you inside battery)4. li-ion battery: 3.7v 1000mAh5. Output:5.3V 500mA6. Super long standby time:more than 1 month7. Indication: charging with LED bar .Discharging with warning for low battery.blinkling LED for operation8.Protection: Charging current limited ,discharging current limited ,protecion for overcharging ,discharging ,over current ,short circuit.9,Alternative outputs, can charge various digital devices with voltage of DC 5V±0.5V and current of ≤500mAh. Such as 98% cellphones, Ipod products,GPS,PSP,MP3/MP4,PDA,Bluetooth etc.10,Super long lifespan: more than 500cycles of charge&discharge circle.11,You can choose right connectors freely for your devices.Main parameters:Battery capacity(Lithium-ion battery)3.7V/1000mAhCharging time by AC-DC adapter(5.5V 500mA)2to 3HrsCharging time by PC USB port(5V 500mA)3HrsCharging time under sunlight(1000W/m2)13HrsMax.current by solar(1000W/m2)100mAMax.load current500mA Running time for a fully charged product:Mobile phone standby time60Hrsmobile phone talking time3HrsPSP/DS lite8HrsPDA30HrsNavigation2to 3HrsCamera:600imgsAccessiores:USB input charging cable1pcOutput cable1pcMobile phone connectors4pcs