1.Compatible model(s):K770/K858/K850/S312/S200C/S500i/T650/T658/W580/W980 2.Cell chemistry PCM:Li-ion battery3.Double protection IC with NTC offer over-discharging, over-current and short circuit protection, more safe-guard for using.4.Gilded and flexible connector,better conductive protertiey, not easy to rust.5.Safety and stable: Hi-tech lithiun battery,undergoes drop test,smash test and punchture test to ensure, no fire and explosion in breaking.6.Grade A Li-ion battery cell, high energy enviornmental protection,durable energy conservation,long standby time and long talking time.7.guarantee time:1 year8.working 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 us!