VIPstore&reg; 10000mAh Solar Panel Charger Dual-Port Solar Charger Backup External Battery Power Pack for Cellphone / Tablet / Mp3 / Mp4 / GPS / Camera (black) Compatible with most kinds of 5V USB-charged devices. Stylish, compact and lightweight design fits perfectly into any bag, easy to carry on the go. Solar energy technology, environmental friendly and could recharge itself under sunshine for emergency purpose when outside. High capacity of 10000mAh with 2 USB output, USB1: 5V/1A(for cellphones); USB2: 5V/2.1A(for teblets). Quick charging current and charge 2 devices at the same time. Build-in Li-ion Polymer cells and microchips, high quality and long lifespan. More than 800 charge cycles during the course of its life. With LED power indicator.Press to charge and press it again stop charging. practical and long cycle life.