Last night around 9 PM, we heard what sounded like a gunshot. Went out and looked around. No clues. This morning I see that one of the two 12V batteries on the tongue of my 20 ft trailer had exploded!...
As others have said one cell shorted. That probably caused all the other cells to gas (not boil). Once the hydrogen so created got exposed to an ignition source. *BOOM*
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