wrote:
I had the same problem with a 12 AH gel cell in my LS4. PowerSonic
Battery was dead in less than a year. I concluded that keeping the
battery on float indefinitely (even with a charger designed for that)
was probably not a good idea and could have cooked the battery.

I bought a new battery, never charged it more than overnight, and so
far (two years) have had no more battery problems.

Were the charger and the battery where they saw high temperatures (say,
over 90 degrees F), like being in a hangar during the summer? A lot of
chargers are designed for room temperature operation, so unless the
charger was a temperature compensating type (adjusts the output for
ambient temperatures - not common), it might have overcharged the battery.

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Eric Greenwell
Washington State
USA