Rechargeable Lithium Batteries 18650

No.

Items

Specifications/

Remark

1

Nominal Capacity

2600mAh

0.2C Standard discharge

2

Minimum Capacity

2520mAh

3

Nominal Voltage

3.7V

Mean Operation Voltage

4

Delivery voltage

3.80~3.9V

Within 10 days from Factory

5

Charge Voltage

4.2V±0.03V

By standard charge method

6

Standard charging method

0.2C constant current,4.2V constant voltage charge to 4.2V,continue charging till current decline to ≤0.01C

7

Charge current

0.2C

520mA

Standard charge, charge time about 6h(Ref)

0.5C

1300mA

Rapid Charge, charge time about: 3h(Ref)

8

Standard discharging method

0.2C constant current discharge to3.0V,

9

Cell Internal Impedance

≤50mΩ

Internal resistance measured at AC 1KH_Z after 50% charge

No

Items

Test Method and Condition

Criteria/

1

Rated Capacity at 0.2C(Min.)

After standard charge, the capacity shall be measured on 0.2C discharge till the voltage discharge to3.0V,

≥2522mAh

≥100%

Rated Capacity at 0.5C(Min.)

After standard charge, the capacity shall be measured on 0.5C discharge till the voltage discharge to 3.0V,

≥2471mAh

≥98%

Rated Capacity at 1C(Min.)

After standard charge, the capacity shall be measured on 1C discharge till the voltage discharge to 3.0V,

≥2421mAh

≥96%

2

Cycle Life

Charging and discharging battery as blew conditions

0.2C standard charge to 4.2V end-off

0.2C standard discharge to 3.0V cut-off

Continuous charge and discharge for 300 cycles ,the capacity will be measure after the200^th cycle

≥80% of initial capacity

3

Capacity retention

The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 20~25℃ for 28 days.

Measure the capacity after 30 days with 0.2C at 20~25℃ as retention capacity

Retention capacity

≥85%

NO

Items

Units: mm

1

diameter

18.3±0.2

3

Height

65.3±0. 2