Engine: Electricity

1. A NiCad batteries need fewer cells connected in series for the same battery bank voltage and require less mounting space
2. B NiCad batteries are able to hold their charge for long periods of time without recharging due to less local action (open-circuit self-discharge)
3. C NiCad batteries use a water-free electrolyte that is not subject to evaporation (even in batteries that are not of the sealed type)
4. D NiCad batteries have electrochemical characteristics that allow specific gravity to be used as a convenient means of determining the state of charge

Tip: press A-D to answer