wrote in message
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"6. Don't use gel batteries in vibration prone environments. "

Hmm, I thought that was the idea behind gel cells partly. That the
electrolyte is pretty much trapped against the plates and doesn't shlosh
arond. Live nd learn I guess.

What about those battery desulfaters ? From what (actually little) I've
seen of them, they put an AC current on them, which presumably somehow
dislodges the sulfate from the plates.

The Optimate charger I have includes a desulphate function - it applies 29V
current limited, AFAIK its also pulsed.