Primary Battery - A battery which is not intended to be recharged and is discarded when the battery has delivered all of its electrical energy.
Specific Energy - The ratio of the energy output of a cell or battery to its weight (Wh/kg). This term is used interchangeably with gravimetric energy density.
Constant Current Discharge - A battery discharge regime whereby the current drawn during the discharge remains constant.
Discharge - The conversion of the chemical energy of a battery into electrical energy, and the withdrawal of the electrical energy into a load.
Voltage Reversal - The changing of the normal polarity of a battery due to overdischarge.
Internal Resistance (IR) - The opposition exhibited by a circuit element to the flow of direct current (d.c.). In a cell, the internal resistance is the sum of the ionic and electronic resistances of the cell components.
Hertz - The standard unit of frequency. A frequency of one complete cycle per second is a frequency of one hertz.