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311 Posts
Discussion Starter · #1 ·
I'm stupid an lazy, please don't rub it in.

I let my 3 2-year-old Optima batteries run flat in a frozen boat all winter.

Now it seems like they're not holding a charge...can't tell for sure because the boatyard keeps unplugging my extension cord after I leave. But they're dead upon return, even though the do hold a charge for a while as evidenced by cabin lighting after I've been hanging out while the charger has been on for a few hours.

The charger is a good one, a Heart Interface inverter/charger combo, set to AGM appropriately.

Is there anything I can do to resussitate these batteries?

Is it likely that my mistreatment would kill 'em?

3 x $200 , yuck.
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