we are a professormobile phonebattery manufacturer ,If you are interesteringmobile phone battery, please feel free to contact me ! 1)Color: Black 2)Standard Voltage: 3.7V 3)Guarantee time: 1 year 4)Normal capacity: 900mah 5)Cell chemisty PCM: Li-ion battery 6)Working temp.: -10 - +50°C 7)Double IC and NTC PCB offer over- discharging,over-charging,over-current and short-circuitprotection 8)Safety and stable: Hi-tech lithium-ion battery, undergoes drop test,smash test and acupuncture testto ensure no fire and explosion in breaking 9)Battery charging time: approx. 5 hours 10) we have half housing and full housing meet for different market 11) weight :0.025 kgs without package . 12) we have closely coopereating shipping company . ModelFor Nokia BP-5MNominal Voltage3.7VAverage Capacity850mAhInternal Resistance≤ 2m ΩDischarge Cut-off2.7VMaximum Charge Voltage4.2VMaximum Charge Current150AMaximum Discharge Current200ACharge MethodCC/CVDimensionsHeight :141.0 + 0.5mmThickness :17.0 + 0.5mmWidth :67.0 + 0.5mmWeight≤ 410gAmbient TemperatureCharge0 -45Discharge-20 -55Storage<1 month -20 55 <3 month -20 45 <6 month -20 25