VRLA battery
Abbreviation for >> Valve Regulated Lead Acid Battery
Sealed battery, also called recombinent battery. Battery where the electrolyte is fixed in the >> AGM separator. Mainly used for Stand By applications, ongoing
developments for using this technology also for >> SLI applications.

Venting valve, recloseable
Safety valve in the cell which opens in case of overpressure and closes again automatically when normal pressure has been restored (e.g. gel battery, AGM battery).

Vibration Tester
Tests a starter battery with 3-6g at a given frequency.

Volt
Unit of measurement for electrical voltage. Abbreviation V. Named after the Italian physicist and doctor Count Alessandro Volta (1745 - 1827).

Voltage and temperature dependent cut-off (VTCO)
See Cut-off, voltage and temperature dependent.

Voltage dip
A momentary drop in voltage when high current discharging is used (e.g. in the case of lead accumulators).

Voltage drop
Should current flow through a resistor inside a closed electric circuit, a voltage drop will occur.

Voltage plateau
A slow decrease in voltage over a long period of time. Characteristic for many discharges of closed cadmium cells and closed lead cells. As a rule, the plateau extends
from the first voltage drop at the start of the discharge to the bend of the curve after which the voltage drops rapidly at the end.

Voltage, nominal
The battery's average voltage during discharging with a low current strength. The manufacturer specifies the value on the accumulator (e.g. Ni/Cd = 1.2 V per cell).