Li-ion Rechargeable Button Cell LIR2477 I RE G ST FI RM BSI E RED BRIEF SPECIFICATION Model: LIR2477 Nominal Voltage: 3.6V Nominal Capacity: 130mAh Weight: 7.8g Standard steel container ISO9002 Certified EEMB Li-ion Products Abstracts Edition V Nov. 2000 1. PREFACE The following content is established to specify the characteristics of the Rechargeable Li-ion Button Cell ( "CELL"), manufactured by EEMB Co., Ltd. 2. DESCRIPTION AND MODEL 2.1 Description Li-ion Rechargeable Cell ( Model: LIR2477) 3. RATINGS 3.1 Nominal Capacity 130mAh 3.2 Nominal Voltage Average: 3.6V (from 4.20V ~ 2.75V cut-off at discharge current 25mA) 3.3 Charging Method 3.4 Charging Voltage 3.5 Initial Charge Current 3.6 Charging Time Constant Voltage with Limited Current 4.20V Standard Charge: 20mA Rapid Charge: 50mA Standard Charge: 6.5hours Rapid Charge: 2.6hours 3.7 Max. Charge Current 65 mA 3.8 Max. Discharge Current 130mA 3.9 Discharge Cut-off Voltage 2.75V 3.10 Weight 7.8g 3.11 Dimension 3.12 Operating Temperature 3.13 Storage Temperature Height: Max. 7.7mm Diameter: Max. 24.5mm Charge: 0 oC to 45 oC Discharge: -20 oC to +60 oC 1 Month: -20 oC to +60 oC 3 Months: -20 oC to +45 oC 1 Year: -20 oC to +20 oC 4. OUTLINE DIMENSIONS Please refer to the drawing Figure 1. Http://eemb.com E-mail:[email protected] EEMB Li-ion Products Abstracts Edition V Nov. 2000 5. APPEARANCES There shall be no such defect like scratch, flaw, crack, rust, discoloration and leakage which may affect commercial value of the CELL. 6. CHARACTERISTICS 6.1 Standard Charge The "Standard Charge" means charging the CELL with initial charge current 20mA and with a constant voltage 4.2V at +25oC for 6.5hours 6.2 Rapid Charge The "Rapid Charge" means charging the CELL with initial charge current o 50mA and with a constant voltage 4.2V at +25 C for 2.6hours 6.3 Nominal Capacity The nominal capacity is the initial discharge capacity of the CELL, which is measured at discharge current 20mA with 2.75 cut-off at +25oC within 1 hour after the Standard Charge. 6.4 Cycle Life Each cycle has each phase of charge current 20mA and discharge current 20mA with 2.75V cut-off voltage at +25 oC. Capacity after 499 cycles and plus one day, measured under the same conditions stated in 6.3.and the capacity is over 95mAh. 6.5 Temperature Dependence of Capacity The capacity varies under various temperatures. Capacity at each temperature, measured with discharge current 20mA with 2.75V cut-off voltage at +25 oC within 1 hour after the standard charge are as follows: Temperature Capacity Retention o -20 C 75% o 0C 90% o +20 C 100% o +50 C 105% o Percentage is an index as the capacity at +20 C is 100%. 6.6 Storage Characteristics o Capacity after 30days storage period at +25 C after the Standard Charge, measured under the same condition stated in 6.3 o Remaining Capacity (after +25 C storage ) is no less than 110mA Http://eemb.com E-mail:[email protected] EEMB Li-ion Products Abstracts Edition V Oct.1999 MECHANICAL DESIGN 4.0 0.3 + - 3.7 21.4 0.15 24.5 0.15 0.3 LIR2477 Diameter 24.5mm + Height 5.0mm DISCHARGE CURVES 0.24C 0.12C 125 Charge Voltage 4 100 Charge Capacity 3 75 2 50 Charge:4.2V max 1 Charge Current 0.2C max Temperature:23 C 25 O 0.0 0 0 0 1 2 3 4 5 Charge Capacity (%) 0.36C 5 Charge Voltage(V) Charge Current (A) Charge Characteristic 0.48C 6 Charge Time (hours) Http://eemb.com E-mail:[email protected] EEMB Li-ion Products Abstracts Edition V Oct.1999 Capacity Ratio (C\C) Cycles Life 100 80 60 Charge:4.2V max 0.2C max 6 hours 40 Discharge:0.2C 2.75V cut off 20 Temperature:23 C O 0 0 100 200 300 400 500 Number Of Cycles Discharge Curves at Various Temperatures Voltage (V) 4.5 3.5 3 2.5 0 C O -10 C O -20 C O 2 20 C O Charge:4.2V max 0.2C max 23 C Discharge:0.2C 2.75V cut off O 0 0 1 2 3 4 5 6 Discharge Time (hours) Discharge Load Characteristic Voltage(V) 5 4 3 0.4C 2 0.2C Charge:4.2V max 0.2C max 6 hours Temperature:23 C O 1 0 1 2 3 4 5 6 Discharge Time (hours) Http://eemb.com E-mail:[email protected]