3.7v lipo battery 4000mAh 15C 1.rechargeble 2. factory direct 3.3.7v 350mAh 4.for RC toys Application:1.Bluetooth,Mp3,Mp4,Gps,E-book ... book,Notebook,PPC,Mobile PC Laptops,2.Tablet PC,PDA,bank card, smart card,Tablet personal computer,flat computer,Telephones,3.Cameras,Romote control helicopters ...