1.

The watt-hour efficiency of a lead-acidcell varies between

Answer»

It is a ratio between the energy which a cell gives out during discharging and the energy which it requires to regain its original condition during charging.

It is expressed as,

E% (Efficiency) = watt-hours on discharging/watt-hours on charging

As, voltage on discharge is always less than voltage on charge. Efficiency is always less than 100%.

For a normal lead-acid battery, efficiency varies from 80–85%.



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