Cell chemistry PCM:Li-ion batteryDouble protection IC with NTC offer over-discharging, over-current and short circuit protection, more safe-guard for using..Gilded and flexible connector,better conductive protertiey, not easy to rust.Safety and Stable: Hi-tech lithiun battery,undergoes drop test,smash test and punchture test to ensure, no fire and explosion in breaking.Grade A Li-ion battery cell, high energy enviornmental protection,durable energy conservation,long standby time and long talking time.Guarantee time:1 yearWorking temp: -15 to 50.We can make most kinds of mobile phone batteries. For more details of our company and Products pls feel free to contact with us by marlyna-1980 hot mail com!We will give you reply soon!