question

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I connected the charger under normal option to a good battery - 12.6v on multimeter - and left it there to charge and maintain for 10 days. When I checked today, battery was hot and had no charge - 10.1v. The statistics are shown in the attached screenshot. The battery now ruined!!

Why

AGM Battery
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What type of battery? Sealed, flooded, AGM etc. ?
@Lvanrensburg

100AH on cycle 3, thats a pretty evil discharge amount for a lead based battery.

P.S. voltage on a lead acid battery means nothing. I have one that sits at 13.4V, but will not take a charge everever.

Mant things could have happened left unattended like that. Heat suggests shorted plates internally maybe? Or not enough electrolyte. No idea without seeing the battery.

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lvanrensburg answered ·

Everything became clear!! The battery I put in my caravan was one that was already damaged and finished. It showed 13.6 on the digital meter, but obviously could not hold charge. I have now replaced with a proper good battery and will see the resilts. So far going well.

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