21700 4000mAh li ion battery

No.

Item

General Parameter

Remark

1

Charge Voltage

4.20±0.02V

Charge mode:CC/CV

2

Nominal Voltage

3.7V

3

Capacity

Nominal

4000mAh

Standard discharge（0.2C C₅A,2.75V) after Standard charge

Minimum

3900mAh

4

Cycle Life

≥500 Times

One cycle refer to one charge period and then one discharge period.

Test condition:

Charge: 0.2C to 4.2V

Discharge: 0.2C to 2.75V

The cycle life is the cycle times when the discharge capacity is about 70% of the rated capacity.

5

Internal Impedance

≤35mΩ

After standard charging, measure the internal resistance with AC1KHz

6

Standard  Charge

0.2C₅A

Constant Current 0.2C₅A

Constant Voltage 4.2V

0.01 C₅A cut-off

7

Max Continuous Charge

1.0C₅A

8

Standard D ischarge

1.0C₅A

9

Max Continuous Discharge

5.0C₅A