| Term | Definition |
|---|---|
| VALVE | A normally sealed mechanism which allows for the controlled escape of gasses from within a cell. |
| VENT | A device which allows the escape of gasses from within a cell. |
| VOLTAGE EFFICIENCY | A ratio of the average voltage during discharge to the average voltage during recharge, under specified conditions. |
| VOLTAGE SPREAD | A term used to describe the difference between the highest and lowest individual cell voltage readings in a battery. For example, if in a 60 cell battery, the lowest cell read 2.20 Vdc and the highest cell read 2.30 Vdc, the voltage spread would be 0.10 V. |
| VRLA |
VALVE REGULATED LEAD ACID A cell that is sealed and fitted with a valve which opens to vent the cell whenever the internal pressure of the cell exceeds the pressure external to the cell by a set amount. |