Voltage Reversal - The changing of the normal polarity of a battery due to overdischarge.
Charger - Device associated with the rectifier and used to supply the battery with the electrical power (DC current) required to recharge and/or float charge the battery, thus ensuring the rated backup time.
Capacity - The total number of ampere-hours or watt-hours that can be withdrawn from a fully charged cell or battery under specified conditions of discharge.
Midpoint Voltage - The voltage of a battery midway in the discharge between the start of the discharge and the end voltage.
Noise level - Acoustical decibel level of a source of noise, measured according to the applicable ISO standard.
Trickle Charge - A charge at a low rate, balancing losses through local action and/or periodic discharge, to maintain a cell or battery in a fully charged condition.
Coulomb - The amount of electricity transported by a current of one ampere flowing for one second.