IEC (International Electrotechnical Commission) - Advisory organization that draws up international standards in the electrotechnical field.
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).
Battery cells - The interconnected battery elements that supply electrical power created by electrolytic reaction.
Ambient Humidity - The average humidity of the surroundings.
Parallel - Term used to describe the interconnection of cells or batteries in which all the like terminals are connected together. Results in increased capacity.
Ampere-Hour Capacity - The quantity of electricity measured in ampere-hours (Ah) which may be delivered by a cell or battery under specified conditions.
Overdischarge - The process of discharging a cell or battery beyond its cutoff voltage and possibly into voltage reversal.