Is 11.8v low for a brand new AGM battery that has sat overnight for less than 24 hours?

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I have a 2006 Acura TSX sedan. I just bought and upgraded to an AGM battery for my car because it has been cranking slow due to the cold weather lately, plus I had the extra money.

However I just woke up this morning and I have one of those car Bluetooth FM adapters that flashes my battery voltage briefly during startup. I was getting a reading of 11.8v after just one night of sitting in the cold? Seems really low according to online charts? And my car cranked slow again too. Is it normal for a battery to get that low? I don't have anything draining it as far as I am aware?

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Posted: 1 year ago
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