BAK 40D 21700 4000mAh 70A

Type   flat top
Rated Capacity    4000mAh
Typical Capacity    4100mAh
Rated Energy    14.4Wh
Typical Energy    14.76Wh
Limited Charging Voltage (Ucl)    4.2V
Upper Charging Voltage (Uup)    4.25V max
Discharge Cutoff Voltage (Udo)    2.0V (absolute)
Standard Charge Current    2A
Max Charge Current    45A
Standard Discharge Current    800mA
Max Discharge Current    70A (with 80°C cut off), 45A without cutoff
Internal Resistance    ≤5 mΩ (AC, 1kHz)
Diameter    Max 21.45mm
Length    Max 70.75mm
Weight    ≤68g
Operating Temp (Charge)    0°C to 45°C
Operating Temp (Discharge)    -20°C to 60°C (up to 80°C surface in use)
Max Surface Temp (Charge)    60°C (must cool below 45°C to recharge)
Max Surface Temp (Discharge)    80°C (must cool below 60°C to re-discharge)

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