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Originally Posted by vpoppv
It sounds like you might have a dead cell. While in my personal experience I have had good luck with desulfators, they can't overcome a dead cell.
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This thread seems the closest to my question, so here goes. I have charged my chevy batteries for many years, without disconnecting any cables from the car - however found this in the 1999 honda owner's manual.
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Charging the battery with the cables connected can seriously damage your car's electronic controls. Detach the battery cables before connecting the battery to a charger.
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Is this really necessary?
Do you disconnect the cables when charging a car battery?