OCV - open-circuit voltage.

Ohm - The unit of measure for resistance within an electrical circuit. Its symbol is the Greek letter omega.

Ohm's Law - An equation — E (Volts) = I (Current) x R (Resistance) — that expresses the relationship between volts, amps and ohms in an electrical circuit with resistance.

Ohmmeter - An instrument used to measure resistance in an electrical circuit.

Open Circuit - A circuit that has a broken or interrupted path, preventing current flow.

Open-Circuit Voltage (OCV) - The no-load voltage of a cell or battery measured with a voltmeter. See also Closed-Circuit Voltage.

Overcharging - The forcing of current through the battery after it is fully charged. Overcharging reduces service life and can damage the battery.