No

ITEM

TEST METHODS

STANDARED

1

Dimensions

Using vernier caliper (accuracy≥0.02) while avoiding short-circuit

Diameter

20.0 (-0.20) mm

Height

2.5(-0.20) mm

2

Off-load voltage

Using multimeter (accuracy≥0.25%) internal resistance≥1MΩ

≥3.20v

3

Instantaneous short-circuit current

Time of short-circuit should be less than 0.5 second and avoid repeated test within half an hour

≥250 mA

4

Appearance

Eyeballing

Bright, clean, no rust, no leakage, And no flaw

5

Capacity

Continuously discharge for 8 hours with load 7.5k, temperature at 20~25°C, humidity at 65±20% till 2.0v end-voltage (for fresh battery only: within 3 months )

≥375h

6

Vibration test

Put battery on the platform of the vibrations machine, start the machine and adjust the frequency form 10 times per minute to 15 times per minute. keep it running for an hour

Characteristics keep stability

7

Leakage at high temperature

Stored under temperature (45°C) for 30 days

Leakage rate≤0.6%

8

Over discharge

Test

After 2.0v end-voltage, continuously discharged for 5 hours

No leakage allowed