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Aug 14, 2025 - 05:33 AM
If the polarity was reversed while charging, the AGM battery has likely suffered internal damage that can’t be fixed by simply draining and recharging it. Reverse charging can permanently affect the battery’s chemistry and may also create safety risks like overheating or swelling. It’s best to stop using it, have it tested by a professional, and be prepared that replacement is often the only safe option.
