Typical Characteristics
The data in this document are for descriptive purposes only and are not intended to make or imply any guarantee or warranty. Issued date : 06.2021
Lithium
Data sheet ML621
General Specifications
3
5.8
0.015
Max. Discharge Current (mA)
Pulse
*2
1.5
Charge/Discharge Cycle Characteristics
Discharging Depth of 20% 300
Charging Method (V)
Constant Voltage Charge 2.8 ~ 3.25
-20 ～ +60
Diameter(D) 6.8
Height(H) 2.1
0.22
Dimensions (mm)
Nominal Voltage (V)
Standard Charge/Discharge Current (mA)
Approx. Weight (g)
Operating Temperature Range (℃)
Nominal Capacity (mAh)
*1
Nominal capacity is determined at an end voltage of 2.0V when the battery is allowed to
discharge at a standard current level at +23
o
C.
*1
Expected life is 5 years at room temperature.
*
Consult with FDK when considering multiple-cell construction.
*
Note) Battery Handling Precautions
English) http://www.fdk.com/battery/lithium_e/handling_precaution.html
Japanese) http://www.fdk.co.jp/battery/lithium/handling_precaution.html
Current value for obtaining 2.0V cell voltage when pulse is applied for 15 seconds at 50%
discharge depth (50% of the nominal capacity) at +23
o
C.
*2
D
H
Temperature Characteristics
1.0
1.5
2.0
2.5
3.0
3.5
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Capacity (mAh)
Cell Voltage(V)
Charge Condition:3.0V 50hour(R=1kohm)
Discharge Condition:150kohm
-20
o
C
23
o
C
60
o
C
Discharge Characteristics after storage
1.0
1.5
2.0
2.5
3.0
3.5
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Cell Voltage(V)
Capacity (mAh)
After 20days storage at 60
o
C
Charge Condition:3.0V 50hour(R=1kohm)
Discharge Condition:150kohm
Temp.: 23℃
Discharge Characteristics after Over-Discharge
0 100 200 300 400
1.0
1.5
2.0
2.5
3.0
3.5
Duration (hour)
2007.06.06
SANYO Electric Co., Ltd.
Cell Voltage (V)
Discharge Characteristics of ML621(5.8mAh) after Over-discharge
Test condition
charge:3.0V 1kohm 50hours
discharge:150kohm
discharge temp:23deg.C
This data is just based on each lot and does not mean warranty.
Cell Voltage(V)
Duration(hour)
Charge Condition:3.0V 50hour(R=1kohm)
Discharge Condition:150kohm
Temp.: 23℃
After 30days discharged at 150kohm
Continuous Charge Characteristics
1.0
1.5
2.0
2.5
3.0
3.5
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Charge Condition:3.0V 20days(R=1kohm) at 60
o
C
Discharge Condition:150kohm
Temp.: 23℃
After 3.0V (R=1kohm) charge at 60
o
C for 20days
Cell Voltage (V)
Capacity (mAh)
Charge Characteristics
Charge/Discharge Cycle Characteristics
5 10 50 100 500 1000
3.0
4.0
5.0
6.0
Load Resistance (k)
Discharge Capacity (mAh)
ML621 Load vs. Discharge Capacity
Charge: 3.0V 50hr (R = 1k)
Discharge: 5.6k ~ 1M End Voltage: 2.0V
Temp.: 23
o
C
Discharge Capacity(
mAh)
Load Resistance (kohm)
Charge Condition:3.0V 50hour(R=1kohm)
Discharge Condition:5.6kohm～1Mohm
End voltage: 2.0V Temp.:23℃
1.0
1.5
2.0
2.5
3.0
3.5
0 50 100 150 200 250 300 350 400 450 500
Cell Voltage at End of Discharge (V)
Cycle Number
Charge Condition:0.1mA 3.0Vcut
Discharge Condition:0.1mA 5.5h
Temp.: 23℃