BATTERY — Two or more cells connected together.
CELL — An electrochemical system that converts chemical energy into electrical energy.
PRIMARY CELL — An electrochemical device that is discharged only once and then discarded. Alkaline batteries are an example.
SECONDARY CELL — An electrochemical device that may be discharged and recharged a number of times. NiCad batteries are an example.
BATTERY CAPACITY — The ampere-hours available from battery.
BATTERY FLOAT VOLTAGE — A constant voltage applied to a battery to maintain the battery capacity.