China Li-Polymer Cell Manufacturer Customized Smart Speaker Battery UFX 686770 3.7V 4000mAh Li-ion Polymer Battery

No.

Item

General Parameter

Remark

1

Rated Capacity

Typical

4030mAh

Standard discharge(0.2C C₅A) after Standard charge

Minimum

4000mAh

2

Nominal Voltage

3.7V

Mean Operation Voltage

3

Voltage at end of

3.0V

Discharge Cut-off Voltage

Discharge

4

Charging Voltage

4.2±0.03V

5

Internal Impedance

≤65mΩ

Internal resistance measured at AC 1KH_Z after 50% charge

The measure must uses the new batteries that within one week after shipment and cycles no more than 5 times

6

Standard charge

Constant Current 0.2C₅A

Charge time : Approx 6h

Constant Voltage 4.2V

0.01 C₅A cut-off

7

Standard discharge

Constant current 0.2 C₅A

end voltage 3.0V

8

Fast charge

Constant Current 0.5C₅A

Charge time : Approx 2.5h

Constant Voltage 4.2V

0.01 C₅A cut-off

9

Fast discharge

Constant current 0.5C₅A

end voltage 3.0V

10

Maximum Continuous Charge Current

1 C₅A

11

Maximum Continuous Discharge Current

1C₅A

12

Operation Temperature Range

Charge: 0~45℃

60±25%R.H.

Bare Cell

Discharge: -20~60℃

13

Storage Temperature Range

Less than 1 year: -20~25℃

60±25%R.H.

less than 3 months: -20~40℃

at the shipment state

14

Pack  Dimension

High: max72mm

Width: max67mm
Thickness: max6.8mm

Initial  Dimension