- The capacity of the battery is measured by unit ampere hour capacity.
- Efficiency of battery is ratio between discharging and changing current.
Efficiency (ƞ) =
Ampere hour output
Amper hour input
Charging of battery :-
Battery has to be charged with DC.
(i) Charging voltage :-
Always heigher than voltage to overcome the initial resistance of the battery and the charging current to flow through the battery.
(ii) Float charging :-
Charging a fully charged battery under no load at a rate equal to its self discharging rate. This enable the battery to remain at fully charged condition. Onboard float charging done for maintaining battery voltage.