Trickle charger or float charger--are they the same? I understood a
trickle charger to supply a low amperage charge continuously while a
float charger will stop charging once the battery is fully charged and
then turn itself on again when the voltage drops below a certain
amount. I've got my airplane battery hooked up to a float charger
between flights. I understand a trickle charger will overcharge a
battery if left on continuously.

Has anyone any experience with the battery desulfator (or desulphator)
units that are supposed to break up the crystals that form on the lead
plates that eventually cause the battery to fail?