Specifications Item BL-4C for Nokia Capacity 890mAh Capatible model 3500C/6100/5100/3108/7270/7200/6260/1202/6101/6102/6170/2650/6131/ 6136/6125/6103/6300/1325/6088/6301/6131i/1661/6066/ Standby time 7-10daysGurantee time 12Months Working temp -15--+50°C Cycle time More than 500times Standard voltage 3.7V Cell chemisty PCM Li-ion battery 1. Battery made by full lithium cell, long standby time, long talking time.2. Double protective IC:Seiko Reset IC and Sanyo Mosfet with NTC PCB offer over-discharging, over-current and short-circuit protection, more safeguard for using. 3. Safety and stable: Hi-tech lithium-ion battery, undergoes drop test,smash test and acupuncture test to ensure no fire and explosion in breakin. For more information about our products, please free to contact us!Welcome OEM or ODM! Warning 1.Do not over charge or over discharge batteries. 2.Do not short circuit, incinerate and disassemble batteries. 3.Do not impact the battery. 4.Do not loose the battery 5.Do not use inferior charge to recharge this battery in case of damaging the battery. 6.Put it beyond the reach of children.