Venting - The release of excessive internal pressure from a cell in a manner intended by design to preclude explosion.
Voltage cutoff - A voltage sensing device which will end a charge or discharge at a preset voltage value.
Voltage limit - A voltage value a battery is not permitted to rise above on charge and/or fall below on discharge
Voltage regulator - A circuit which provides a fixed or controlled voltage output from a variable voltage input. Used in power supplies and chargers. Switching regulators , Linear regulators and Shunt regulators are the most common types.
Voltaic efficiency - The ratio (expressed as a percentage) between the voltage necessary to charge a secondary cell and the corresponding discharge voltage.
VRLA battery - Valve Regulated Lead Acid Battery