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Old 11-05-2012, 08:49 AM   #6
Bill Harris
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Joined: Sep 2008
Location: backwoods Alabama
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Remember, the open-circuit ("resting") voltage of a lead-acid battery is an indicator of the state of charge. The 12.85V you measure is close to 100% charge.

And once you get down to 12V, it's at half charge.

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