LIR20321. PrefaceThe purpose of this product specification is to provide technical information for the rechargeable Lithium-ion button battery LIR2032, supplied by Guangzhou Markyn battery Co., Ltd.2. Description and Model 2.1 Description2.2 Model3. Specification3.1 Rated Capacity3.2 Charging Voltage3.3 Nominal Voltage3.4 Constant Charging Method3.5 Cut-off Discharge Voltage3.6 Max.Discharge Current3.7 Max.Charge Current3.8 Cycle Life3.9 Ambient Temperaturefor Standard Chargefor Discharge3.10 Storagefor within the temperaturefor within the humidity 3.11 Energy DensityWh/LWh/Kg3.12 Weight of Bare Cell3.13 Charge State Internal Impedance4.AppearanceRechargeable Lithium-ion button battery LIR203235mAh4.20V3.7V at 0.2C mAConstant voltage 4.20V Constant current:17mA 3.00V35mA35mA>500 cycles at 1C mA discharge0°C~ 45°C -20°C~ 60°C-20°C~ 60°C =75%~200 ~902.6g <550mOAppearance shall be free from any remarkable scratch,flaws, rust, discoloration or electrolyte leakage(visible or by smell)5.Standard Test condition 5.1 Environment ConditionsUnless otherwise specified,all test stated in this Product Specification are conducted within the temperature 15~25°C and the humidity 45~85%RH. LIR20325.2 Test Equipment(1) Impedance meterThe impedance meter with AC 1kHz should be used6.Test Procedure and Its Standard ItemMeasureing ProcedureStandard6.1 AppearanceVisualNo Defect and Leak6.2 DimensionCaliperAs item 86.3 WeightScaleAs item 3.126.4 Maximum Charge CurrentCCCV(Constant Current Constant Voltage)35mA6.5 Full chargeCCCVCC-0.2CmA CV- 4.2V total 5hrs6.6 Open Circuit VoltageWithin 1hr after full charge,measure Open circuit voltage>4.15V6.7 Internal ImpedanceMeasure the battery with 1kHz AC<550mO6.8 Discharge CapacityWithin 1hr after full charge,discharge until final discharge,at 0.2C mA and measure the capacity~35mAh6.9 Maximum Discharge CurrentUntil final discharge voltage35 mA6.10 Charge/Discharge Cycle LifeCharge:CCCV,CC- 0.5CmA,CV- 4.2V for 5hrDischarge:0.5CmA to 3.00V,This charge/discharge shall be repeated 500 timesDischarge capacityshould be >70% of item 6.86.11 Leakage ProofAfter full charging,the battery shall be stored at 40±2°C and humidity 80±5%for 21 daysNo leakage should be observed by visual inspection6.12 Temperature Characteristics1)After full charge at 20±5°C ,stand at -20±2°C for 18h,then dischargeat 0.2C mA and measure the capacity 2)After full charge at 20±5°C ,stand at 55±2°C for 2hrs ,then dischargeat 1C mA and measure the capacityDischarge capacity should be>60% of item 6.8 and no abnormality on its appearance and stucture6.13 Charge RetensionAfter full charging,stand at 20±5°C for 28 days,measure the discharge capacity according to item 7.8Discharge capacity should be>85% of item 6.8 LIR20327.1 Charge/Discharge Characteristics Charge:CC/CV 4.2V, 7mA(0.2C)*8hrs Discharge:17mA(0.5C) Cut-off at 3.00V Temperature:257.3 Temperature Characteristics Charge: CC/CV 4.2V 0.2CA*8hrs Discharge:0.5CA,Cut-off at 3.00V 7.2 Charge/Discharge Cycle Life Charge:CC/CV 4.2V,0.5CA*5hrs Discharge:0.5CA,Cut-off at 3.00V Temperature:258. Dimension(Bare cell) mm GM Battery Co., Ltd