OH-BOX&reg; 15200mah Power Bank Lithium Polymer Backup Battery Portable External Battery Two USB Port Charger Power Bank for Mobile Phone Eletronic Devices 15200mAh Reliable Lithium Polymer battery;500 times cycles life of the battery. Double USB output charging two devices at the same time. High capacity and compact, slim, portable simply design; Perfect for long plane flights and road trips; Carry the power wherever you go, charge your devices any where at any time. Multiple safety system design: temperature resistance;input overvoltage protection;output overvoltage protection;short circuit protection;incorect charger protection;overcharge and over discharge protection;rest mechanism;output overcurrent protection;PTC protection for cell.It could be used more reassuring. Compatible with all kinds of tablets,smart phones, cameras, cell phones, PSP, GPS units, digital camera, bluetooth speaker and many other eletronic devices, 5V-USB devices.