I have 2 cells in one 6V battery with poor SG (all balls don't float). This is after resting for a day. Batteries might be original (13 years old). I was planning to replace them in the fall . . . .
Does the on-board charger (whatever Fleetwood provided in 2002) have an automatic equalization mode? Typically I DON'T leave the RV plugged to 120VAC.
They do seem to hold charge longer if RV is left plugged in but I didn't want to overcharge them or run over the cord with the lawn mower . . . . .
Should I plug in and forget?
(checking water occasionally)
Best,
- bob