This is portable energy storage 11.1V 40Ah 500W battery, can be used in camping, relief supply, power failure, engine start application. This device can be used for mobile phone charging, more than 40 times, can be used for computer charging, more than 10 times, for night table lamp lighting, can be used for 150 hours, if using household appliances, such as refrigerator, you can use 6 hour.To Charge this device, use the provided AC adapter, plug one end to the AC adapter and other end into the charge input. Next, plug the AC adapter into a wall outlet. This device will start charging automatically. When this device is fully charged, all four battery status indicator LEDS will show solid green (this could take up to 10 hours).You can also use the solar panels charge to charge your device.