Percent load - Ratio between the power Pu drawn by the load and the rated output Pn of a UPS system (Pu/Pn). Sometimes referred to as the load factor.
Polarity - In electricity, the condition of being positive or negative.
Voltage Depression - An abnormal drop in voltage below expected values during the discharge of a battery.
Fuse - Device used for cutting off an electrical current in the event of an abusive condition.
C-Rate (also see Hourly Rate) - Discharge or charge current, in amperes, expressed in multiples of the rated capacity. For example, C/10 discharge current for a battery rated at 1.5 Ah is:
Gravimetric Energy Density - The ratio of the energy output of a cell or battery to its weight (Wh/kg). This term is used interchangeably with specific energy.
Desorption - The opposite of absorption, whereby the material retained by a medium or another material is released.