li-ion battery 1.rechargeble 2. factory direct 4.for RC toys Application:1.Bluetooth,Mp3,Mp4,Gps,E-book, ... , 3.7V Li ion Batteries, 3.7v Li-ion , 3.7V Lithium Batteries Li polymer ultra thin battery,Li polymer thin battery,Li polymer thin batteries.Rechargeable battery, Li-ion rechargeable battery , Rechargeable ...