Power Sag - Voltage below 80% to 85% of rated RMS voltage for one or more cycles.
Current Drain - The current withdrawn from a battery during discharge.
MTBF (Mean Time Between Failures) - Mathematical calculation of the duration of normal operation of a repairable device between failures. The product, expressed in hours, is an indication on the reliability of the device.
Frequency Variation - A change in frequency of more than 3 Hz.
Battery cells - The interconnected battery elements that supply electrical power created by electrolytic reaction.
Current Collector - An inert structure of high electrical conductivity used to conduct current from or to an electrode during discharge or charge.
Service Life - The period of useful life of a battery before a predetermined end-point voltage is reached.
