We are professional OEM manufacturer & exporter of laptop Batteries for laptop brands including Acer,NEC,ASUS,Apple,HP,IBM,Dell,Toshiba,Compaq and Sony. Battery Type Li-ion Application Laptop Place of Origin China>>Guangdong Model Number 640M Brand Name OEM Color: Black Type: Li-ion Voltage: 11.1V Capacity: 4400/4800/5200mAh Weight: 305g