I’ve done this to Optima Yellow Tops---main thing is that you’ll want to use a Forstner or other drill bit that won’t poke down into and damage the cell plates. I can’t comment on how effective it was because not long after doing this, I left the batteries charging with an equalization charge that fried the batteries. I’ve read of others who’ve done this also.
It’d really help to have a mapping of the best spots to drill into each cell before you do this---you could hit a conductor and that might not be good.
-mt
From: electricboats@
Sent: Saturday, July 17, 2010 10:03 AM
To: electricboats@
Subject: [Electric Boats] Re: Optima vs Lifeline
Has anyone ever tried to drill a small hole in an AGM battery and add water to one that has dried out and then plug the hole and see if it can be brought back?
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