NO.

Items   

Specifications 

1

Model 

 20P1 (INR18650-2000)

2

Can Material 

Ni-Iron 

3

Min  Capacity 

1950 mAh（0.2C）

4

Nominal Voltage 

 3.7V

5

Max. Charge Voltage 

4.2 V

6

Discharge Cut-off Voltage 

2.750V

7

Max. Charge Current 

4A

8

Max. Continuous Discharge Current 

 20 A

9

Max. Pulse Discharge Current 

30A（ 2s pulse  ）

10

Max. Diameter（include PET）

18.4±0.05 mm

11

Max. Height (include PET) 

65.25±0.15mm

12

Weight (Approx.)

43.0g

13

Impedance （Max. at 1000Hz、charged status）

 15±3mΩ

14

  Pack consistency 

 △Voltage △Impedance △Capacity

15

 Charge Method (CC/CV) 

Standard 

 0.5 C×3 hrs.

Quick

2C×1.0 hrs.

16

 Operating temperature (surface temperature) 

Charge 

0℃～45℃

Discharge 

-20℃～75℃

Storage 

-20℃～45℃

NO.

 Item

Standard

Test Method

1

Discharge rate capabilities

A）1 C  ≥97% B）5 C ≥95% B）10 C  ≥95%

Standard charged under the condition of normal atmospheric pressure and the environmental temperature of 23℃±3℃ and45%～85%RH, then rest for 30mins and discharge at1C、5 C 、10C to the discharge cut-off voltage respectively. Charge/discharge cycle can be conducted for 3 times beforemeeting the Standards（the same below）

       2

capacity retention and recovery

Residual capacity≥94%Recoverable capacity≥*98%

Standard charged under the condition of normal atmospheric pressure and the environmental temperature of 23℃±3℃，Stored for 28 days, then discharge at 0.2 C to 2.75V measuring residual capacity; Then standard charge/discharge measure recoverable capacity.

3

Low TemperaturePerformance

discharge capacity≥85% rated capacityno distortion and no rupture

The cell shall be charged in accordance with the standard charge. Then stored in the temperature of -10℃±1℃ for4h, Discharge at the constant current of 0.2C down to the end-of-discharge voltage 2.50V.

4

Cycle Life

2A charge/ 10Adischarge≥500cycles4A charge/ 20Adischarge≥200cycles  

Charge: The cell shall be charged in accordance with2A(4A)Charge condition and the end-of-charge voltage is4.15V. rest for 30mins.Discharge：10A discharge to 2.75V, one cycle is finished, rest for 60mins. Then repeat above steps, when capacity is lessthan 70% of initial capacity, the battery life is over. Discharge：20A discharge to 2.75V, one cycle is finished, rest for 60mins. Then repeat above steps, when capacity is lessthan 70% of initial capacity, the battery life is over.

NO.

Item

Standard

Test Method

1

Overcharge

No fire、No explosion

After standard charge, rest for 10mins; then charge at constant current of 3C5A to 10V.(or charge at 3C5A for 90mins). 

2

Forced discharge

No fire、No explosion

The battery to be discharged with standard discharging condition, Inverse charge current =1C5A；time: ≥  90mins 

3

Short Circuit test

No fire、 No explosion

The battery to be fully charged with standard charging condition, and short the positive and negative terminals 
       with wire resistance  ≤50mΩ.Tests are to be conducted at 23℃±3℃  and at 55℃ ±5℃, keep 24h or case temperature decline to 20% of the max temperature ,test is over. 

4

Crush test

No fire、No explosion

A battery is crushed between two flat surfaces. The applied force is 13 kN±1kN by hydrocylinder, Once the maximum pressure has been obtained or voltage decrease to 1/3 of nominal voltage sharply, then release pressure. 

5

Shock test

No fire、No explosion

The full charged battery is fixed on shock table, to force a certain shock to three mutual vertical direction, in initial 3ms, the min. average acceleration is 75gn,the peak acceleration is between 125gn and 175gn.

6

Heating test 
       (130°C)

No fire、No explosion

The cells are fully charged with standard charging condition, and put into incubator with nature air or cycled air convected, heat battery by velocity of 5°C ±2°C/min to 130°C±2°C,and maintain for 10mins. 

    7

Temperature 
 Cycling Test

no leakage, no fire, no explosion

The fully charged batteries are placed in a test chamber and subjected to the following cycles: a) Raising the temperature to 75°C ±2°C within 30 minutes and maintaining this temperature for 6 hours. b) Reducing the temperature to minus 40°C ±2°C within 30 minutes and maintaining this temperature for 6 hours. c) Repeating the sequence for a further 9 cycles. d) After the 10th cycle, storing the batteries for 24 hours prior to examination.