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0 100 200 300 400 500 600
0
0.5
1.0
1.5
2.0
2.5
3.0
Charge: 0.05mA 3.0V cut-off
Discharge: 0.05mA X 4h
Temp.: 23
2.6
2.8
3.0
3.2
0
0.5
1.0
1.5
2.0
2.5
Charging Conditon(discharged cell to 2.0V)
Load:3kohm
Temp.: 23
Charging Duration : 50hours
Discharging condition
Load : 300kohm
Temp.: 23
End Voltage : 2.0V
0
50
100
150
200
250
300
350
400
1.0
1.5
2.0
2.5
3.0
3.5
Discharge Condition
Load : 300kohm
Temp.: 23
after 40days storage at 60
0 100 200 300 400
1.0
1.5
2.0
2.5
3.0
3.5
Charging voltage: 3.0V
Load: 300K ohm
60
23-20
Cell Type ML421
Specifications
2.3mAh
3V
0.005mA
Continuous
*2
0.2mA
Pulse
*3
0.6mA
Discharging Depth of 5% 3000
Discharging Depth of 20% 300
Constant Voltage Charge
3.1±0.15V
Hight Temperature
2.95±0.15V
-20
℃～
60
℃
0.1g
Diameter(D) 4.8mm
Height(H) 2.1mm
Dimensions
Charging Method
Nominal Capacity
*1
Nominal Voltage
Standard Charge/Discharge Current
Weight
Charge/Discharge Cycle Characteristics
Max. Discharge Current
Temperature Range
Typical Characteristics
Discharge Characteristics after Storage of ML421
Cell Voltage(V)
Duration(hour)
Discharge Capacity(mAh)
Charging Voltage(V)
Temperature Characteristics of ML421
Charging Voltage vs. Capacity of ML421
Cell Voltage(V)
Duration(hour)
Nominal capacity is determined to an end voltage of 2.0V when the battery is allowed to
discharge at a standard current level at 23
o
C.
*1
Current value is determined so that 50% of the nominal capacity is obtained with an end
voltage of 2.0V at 23
o
C.
*2
o
C
o
C
D
H
Current value for obtaining 2.0V cell voltage when 15sec. pulse is applied
at 50% discharge depth at 23
o
C.
*3
o
C
o
C
o
C
o
C
o
C
Voltage at end of discharge (V)
Number of Cycles
Charge/ Discharge Cycle Characteristics of ML421
o
C