OH-BOX&Acirc; Ultrathin 6mm Thickness 3000mah USB Portable External Backup Battery Charger Power Bank for Android Mobile Phone iPhone Eletronic Devices Nearly 3000mAh reliable battery capacity,use it before it is full charge Light & Ultrathin built-in micro USB data cable and lightning connector for Android to iPhone Compact, slim, portable and simply design; Perfect for outdoor user; Carry the power wherever you go, charge your devices any where at any time Multiple safety system design: short circuit protection;overcharge and over discharge protection;anti-reverse protection;overvoltage protection;overcurrent protection;overpower protection.It could be used more reassuring Compatible with many kinds of eletronic devices like smartphones, cameras, PSP, GPS units, digital camera, bluetooth speaker ,5V-USB devices and so on. Tablets is compatible,but not suggested to a full charge