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Is it ok to use a battery tender on an Optima battery?
The car will be left in storage for months with no one around to check on it. Is it necessary to check on the charger regularly?
I leave my Tender on my AGM battery for weeks depending on how often I can take my car for a spin in the winter. It doesn't hurt to check it once in a while, but from my experience once the light on the Tender goes green it stays there and maintains the battery forever.