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If you are checking China interphone battery,Website:http://www.m-batterys.com, two way radio battery manufacturer and supplier, or interphone battery chinese factory, please feel free to contact M-Batt Electronics, we are always at your service.Nominal Capacity : 1200 mAhDischarge at 0.5C5A afterstandard charge fully.Nominal Voltage:7.4VVoltage at end of Discharge4.8VCharging Voltage:8.5VAC Impedance ≤180 mΩ AC 1KHz6 Standard Charge: 0.5C5 CC/CV→0.05C cutoffCharge time :Approx 3.0h.7 Standard Discharge: 0.5C5 CC→4.8V cutoff8 Fast Charge:1.0C5 CC/CV →0.05C cutoffCharge time:Approx 1.5h.9 Fast Discharge: 1.5C5 CC→4.8V cutoff10.Maximum Continuous Charge Current/2000mA11Maximum Continuous Discharge Current 2000mA12 7.0V Discharge Capacity /≥80%Operation Temperature RangeCharge : 0~45℃Humidity /60±25%Discharge : -20~60℃14Storage T/H Range -20~60℃/60±25%15 Weigh/Approx/:105g16 Product DimensionLength: 65.5mm(MAX)Initial dimensionWidth: 37.5mm(MAX)Thickness: 9.4mm(MAX)Over charge ProtectionOver charge detection voltage4.30±0.025VOver charge detection delay time 1300ms MaxCharging and Discharging1. Do use suitable charger and charge with specified voltage , current and temperature, humidity.We strongly recommend the smart battery charger.Never attempt reverse charging.Avoid over-charging.4. Do not discharge the pack under over-discharge voltage.5. Over-discharging may cause loss of performance, characteristics of the pack function.6. Mechanical shock protection7. Otherwise, it may cause shape distortion, leakage, heat generation and/or rupture.For Safety1. Do not short-circuit with metal wire, necklace, chains or any conductors.2. Do not drop the pack from height.3. Do not twist or bend the pack.4. Do not disassemble the pack.5. Do not use the pack when something abnormal is found such as smells,deformation, discoloration,and so on.6. When the electrolyte leakage occurs, do not touch the liquid.7. Do not soak in water or get it wet.8. Do not have the pack in the hot-temper