Frequency Variation - A change in frequency of more than 3 Hz.
Overdischarge - The process of discharging a cell or battery beyond its cutoff voltage and possibly into voltage reversal.
Power Sag - Voltage below 80% to 85% of rated RMS voltage for one or more cycles.
Desorption - The opposite of absorption, whereby the material retained by a medium or another material is released.
Thermostat - A temperature sensitive switch.
Metal Hydride - An intermetallic compound or alloy in which hydrogen has been absorbed; also, the negative electrode in a nickel-metal hydride battery.
Constant Current Discharge - A battery discharge regime whereby the current drawn during the discharge remains constant.
