... ,over discharging,over current and short-circuit.Products have gone through the drop test,smash test and ... and manufacturing rechargeable power sources and mobile phone batteries.We have mobile phone batteries from AAA to C grades. ... of batteries which are suitable for cell phones such as : Nokia,Black Berry, Samsung, Sony Ericsson, LG, ZTE, Moto ... it's standby Battery bl-4u for nokia OEM service