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Reply to "Overcharging Issue: Toasted Voltage Regulator?"

FWIW, the last time I heard ANY noise from a battery, it was fluid boiling inside an OEM Ford-Motorcraft part....The next start, a water-fill cap blew out and shattered against the hood. The hissing turned out to be an internally shorted battery- which finally ignited the small amount of hydrogen normally generated during charging. The same thing happened to a friend's autocross racer, with the battery mounted next to the driver for better balance. Except in his car, the entire side of the battery blew off on start-up, showering his wife in sulfuric acid! A VERY quick trip to a nearby motel and a thorough shower prevented any scarring, but all her clothes were a total loss.
Bottom Line: if a battery starts making noises, get it out of the car RIGHT NOW!
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