The final discharging voltage is the battery terminal voltage in close circuit voltage per cell to which
a battery discharging safely and maximize battery life. The higher discharging current is, the lower
final discharging voltage of battery should be.
Discharging Current    Final Discharging Voltage(VPC)

Discharging Current	Final Discharging Voltage(VPC)
Up to 0.1CA	1.75
0.11-0.17CA	1.70
0.18-0.25CA	1.67
0.26-1CA	1.60
Above 1.1CA	1.30

The discharging capacity of battery depends on the discharge rate being used and
ambient temperature.
Figure 1 show the different discharging current corresponding to discharging capacity
at 20℃(68℉) to 25℃(77℉) for SP types batteries. They show that the rated capacity of a
battery is reduced when it is discharged at a value of current that exceeds its 10-hours
or 20-hours rate.


At a higher temperature, the capacity of battery increases and conversely at a lower temperature, the
capacity of battery decreases. Figure 2 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.