An arrangement in which the battery and the load are permanently connected in parallel across the DC charging source, so that the battery will supply power to the load if the charger fails. Compensates for the self-discharge of the battery.
Found on http://www.mpoweruk.com/glossary.htm
(Battery) A continuous low rate charge that compensates for the self discharge rate of a battery. Also known as Trickle Charge. Found on http://www.youngco.com/young2.asp?ID=4&Type=3
A method of maintaining a cell or battery in a charged condition by continuous, long-term, constant voltage charging at a level sufficient to balance self-discharge. Found on http://www.youngco.com/young2.asp?ID=4&Type=3