Overdischarge - The process of discharging a cell or battery beyond its cutoff voltage and possibly into voltage reversal.
Constant Current Discharge - A battery discharge regime whereby the current drawn during the discharge remains constant.
Switching Transients - Rapid voltage peak up to 20,000 volts with a duration of 10mS to 100mS.
Thevenin generator - For a given load, it is possible to consider the power supply as a voltage generator, referred to as a Thevenin generator, made up of a perfect voltage Uo generator, in series with an internal impedance Zs - n Uo is the voltage measured across the load terminals, given that the load is to be disconnected (load terminals forming an open circuit), n Zs is the equivalent impedance as seen from the load terminals (again considered an open circuit), obtained by short-circuiting the upstream voltage generator(s).
Discharge Rate - The rate, usually expressed in amperes, at which electrical current is taken from the battery.
Service Life - The period of useful life of a battery before a predetermined end-point voltage is reached.
Reactance (subtransient Uscx %, for generator) - Relative measurement (%) of the internal impedance of an AC generator during harmonic phenomena. This reactance, also called the longitudinal subtransient reactance of the generator, is sometimes identified as X"d. For most common generators, the value ranges between 15 and 20%. It can drop to 12% for optimized systems and to 6% for special devices.
