1 Mobile Phone Battery forSony Ericsson BST-37 2Long standy time:120-168hours 3Capcity:500-1000mAH 4Standa Voltage:3.7V 5Cell chemisty PCM:Li-ion Battery 6Double protection IC with NTC PCB offer over-disharging overcurrent and short circuitprotection,more safeguard for using 7Gilded and flexible connecter,better conductive propertiey 8Satey and puncture test to ensure,no fire and explosion in breaking. 9Grade A Li-ion battery cell,high enery environmental protection durable enery conservation,long stanby time and long talking time 10Guarantee time:1year 11 OEM accepted We can make all kinds mobile phone battery.For more details please feel free to contact us. WARNINGS 1 Do not disassemble the battery 2 Do not short circuit the battery into fire or heat 3 Do not pressing it or dropping it from the high altitude 4 Keep the battery in a cool surrouding if it stands by 5 The batteryoperation time depond on conditions such as: *transmitting power lever *signal between the phone and the base station *network apremeters defind by the operator