Top-Up Charge - A low rate charge following the main charge, designed to ensure maximum capacity.
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.
Hourly Rate (also see C-Rate) - A discharge rate, in amperes, of a battery which will deliver the specified hours of service to a given cutoff voltage.
COS phi - A measure of the phase shift between the current wave and the voltage wave observed at the terminals of a load supplied with AC power at a given frequency.
Thermostat - A temperature sensitive switch.
Charge Control - Technique for effectively terminating the charging of a rechargeable battery.
Wall-less Design - A battery design where the structural support for the cells is formed by an open plastic framework.
