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3.7V 4000mAh 21700 Li-ion Battery Cell

Item No.: 21700-1
Deep Cycle 1000 Times 3.7V 4000mAh 20A 21700 Li-ion Solar Battery for ESS
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Description

No.

    Items

Specifications

1

Charge voltage

4.20±0.03V

2

Nominal voltage

3.65V

3

Nominal capacity

4000mAh @ 0.2C Discharge

4

Charge current

Standard Charging/Discharging: 0.5C(2000mA)

5

Standard Charging method

0.5C CC(constant current)charge to 4.2V,

then CV(constant voltage 4.2V)charge 

till charge current decline to 80mA±5mA

6

Charging time

Standard Charge: 3hours(Ref.)

Rapid Charge: 2hours(Ref.)

7

Max.charge current

1.0C(45℃≥T≥15℃)

8

Max.discharge current

5.0C(45℃≥T>5℃)

9

Discharge cut-off voltage

2.75±0.05V

10

Operating temperature

Charging: 0℃~45℃

Discharging: -20℃~60℃

11

Storage temperature

-20℃~ +60℃

12

Battery Weight

69g±2g

13

Battery Dimension

Height: 21.7±0.2mm (not including tabs)

Diameter: 71.9±0.2mm