Volumetric Energy Density - The ratio of the energy output of a cell or battery to its volume (Wh/L).
Cubicle (single UPS unit) - Cubicle containing a rectifier/charger, an inverter and a bypass. Connected to a battery, it operates alone, forming a single UPS. Compare with Cubicle (parallel UPS unit).
UL - Underwriters Laboratories (UL) is a non-governmental, non-profit certification organization in the United States in which not only government authorities are represented, but also consumer groups, "export" services, research, etc. Following certification, a product may bear the UL label.
Ampere-Hour Capacity - The quantity of electricity measured in ampere-hours (Ah) which may be delivered by a cell or battery under specified conditions.
Circuit breaker (battery) - DC circuit breaker that protects the battery of a UPS.(back)
Battery cells - The interconnected battery elements that supply electrical power created by electrolytic reaction.
Closed-Circuit Voltage (CCV) - The potential or voltage of a battery when it is discharging or charging.