[30 Closed Cab PU]

My definitions, I am sure I will be corrected if there is disagreement.



Trickle charger (sometimes referred to incorrectly as a maintainer) - usually lower current maxim outputs, typically 1 1/2 amp max, charges slightly even when battery is fully charged. Typically the current is low enough so electrolyte boiling-outgassing does not occur.



Maintainer (also referenced as a Smart Charger)- typically lower current max charging. Have additional features as mentioned above, plus have the "float" feature that monitors battery charge and turns off charging when fully charged, and turns on again when battery drops below a set charge level.


Charger - Higher current charging capabilities, does not have the "Smart" features. These have to be manually monitored to avoid overcharging/boiling-outgassing of the electrolyte.