LT Don wrote: > But here is my question. Is there any significant damage done by leaving a > normal battery charger on overnight, where it might get to zero amps but > stay attached for a few hours? This is not a fancy battery charger that > shuts off or kicks into trickle mode or such.
On a typical non-sealed car battery, overcharging will "boil off"* water. If it's not a "maintenance-free" type battery, you can replenish the water; if it's "maintenance-free," you're stuck with a loss of capacity. It might not be noticeable if the overcharging is slight and not done very often. * Nothing is actually boiling. The missing water has been electrolyzed into hydrogen and oxygen and/or evaporated.
