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3 Temperature Effects in Relation to Battery Capacity.

At a higher temperature, the capacity of battery increases and conversely at a lower temperature, the capacity of battery decreases. Figure 4 shows the effects of different temperature in relation to battery capacity.

Can calculate the batteries' rated capacity as following formula if the ambient temperature of tested battery is not 20oC-25oC(68oF-77oF).

C= Ct

1+k(t-25) 

Note: 

C: rated capacity 

Ct: the tested capacity on t 

t: the ambient temperature of 

the tested battery 

k: the coefficient of temperature. It will be

increased if the discharge current 

increased. 

k=0.006 20 hours and 10 hours rated 

capacity testing, 

k=0.01 3 hours and 1 hours rated

capacity testing.

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