Charge - The conversion of electrical energy, provided in the form of electrical current from an external source, to restore the chemical energy in a cell or battery.
Self-Discharge - The loss of useful capacity of a battery on storage due to internal chemical action (local action).
Limiting Current - The maximum current drain under which the particular battery will perform adequately under a continuous drain. The rate is based on whatever drain rate reduces the running voltage to 1.1 volts.
Inverter - UPS subassembly that recomposes a sine-wave output (regulated and without breaks) using the DC current supplied by the rectifier-charger or the battery. The primary elements of the inverter are the DC/AC converter, a regulation system and an output filter.
Microsecond - 1,000,000th of a second (mS).
IEC (International Electrotechnical Commission) - Advisory organization that draws up international standards in the electrotechnical field.
Charge Control - Technique for effectively terminating the charging of a rechargeable battery.