Nominal voltage of the battery (operating voltage) is 1.2 V.
In order to achieve higher values of voltage than 1.2 V, batteries are connected serially.
Nominal capacity of the battery is the five-hour capacity (C5) at the temperature 20 ± 5°C, stated as electricity in ampere hours (Ah) and labeled C5, Ah.
Nominal charge/discharge current is: I=0.2 C5A
Time of charging the battery with nominal current is 7.5-8 hours which makes the battery fully charged
The charging factor is: F=150-160% C5Ah
Time of discharging with nominal current I=0.2 C5A to the voltage of 1.0 V/cell is 5 hours at the minimum.
Electrolyte in the battery is the KOH (potassium-hydroxide) solution in distilled water, with density 1.2 ± 0.01g/cm3
Typical discharge curves for KPM type Ni-Cd cell at 20°C