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  • 21700 4000mAh li ion battery
  • 21700 4000mAh li ion battery
  • 21700 4000mAh li ion battery
21700 4000mAh li ion battery21700 4000mAh li ion battery21700 4000mAh li ion battery

21700 4000mAh li ion battery

  • Model: 21700 4000mAh
  • Dimensions: 21.5×70.5mm
  • Weight: 70g
  • Capacity: 4000mAh
  • Product description: 21700 4000mAh li ion battery for powertool
  • INQUIRY   EMAIL

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 discharge0.2C 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

35

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



Inquiry

CONTACT US

Contact: Sam

Phone: +8615625125975

Tel: +86-0755-86932475

Email: info@futonenergy.com

Add: Room 301, Building 24, Ailian Industrial Zone, Wulian Community, Longgang Street, Longgang District, Shenzhen 518116, Guangdong, China