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3. Electrical Characteristics & Test Condition

Testing Conditions: Ambient Temperature: 25±5ºC; Huminity: 45%~75%.

NO.

Items

Capacity

1

-20°C

Condition

Criterion

Rest for 1 hour after fully charged, then discharge 
with 0.33C current until the battery reaches the 
discharge cutoff voltage. Repeat above process for 
three times, if the discharge time is not less than 180 
minutes, you can stop and define the Discharging 
current*time value (Ah) as battery capacity. 

≥125Ah

Discharge 
Temperature 
Characteristics

At 25±5°C discharge the battery with the current of 
0.33C to the cut-off voltage. Store the battery at 
various temperatures for 2h and discharge the 
battery with 0.33C to the cut-off voltage. Record the 
ratio between discharging & charging capacity.

0°C

25°C

55°C

≥70%

≥80%

100%

≥95%

Charge the battery to full capacity and store it for 28 
days, and then discharge it with 0.33C to the cut-off 
voltage.

Charge Retention 
ability

Remain capacity

≥90%

Charge /     CC (0.33C)/CV (14.6V);
                   End current: 0.05C;
                   Rest time: 1h;
Discharge / CC (0.5C);
                   End voltage: 8.0V;

Repeat above process until discharge capacity is no 
more than 80% of normal value. Accumulated times 
is defined as cycle life.

2

Cycle life (DOD%100)

≥2500 cycles

3

4

03

www.upowerbatteries.com

NA

-12Li125BL

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