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Dave Birdwell Apr 8th, 99, 7:53 PM Ok, we all know that the gas produced by a battery being charged is hydrogen, and that is the main reason for no open flames around a battery. But, if the battery is at rest, I.E no load or charging input, is there still hydrogen gas present, and is sulfuric acid itself flammable??? Thanks, Dave DZAUTO Apr 8th, 99, 9:38 PM NO and NO. The H2 gas is the result of a chemical reaction caused by electrolysis. If there is no electrolysis occuring then no chemical reaction results, thus no H2 gas. Sulfuric acid has no hydrocarbons, thus it is non-flammable. BUT IT CAN BURN LIKE HELL!! Flush with lots and lots of water and/or neutralize with lots of baking soda if necessary. ------------------ [This message has been edited by DZAUTO (edited 04-08-99).] Tom Mobley Apr 8th, 99, 9:57 PM DZAUTO is right, but be aware that batteries don't stop off-gassing instantly as you turn the engine off. It can take a while. Yes, I learned the hard way, is there some other way? Tom Philip Apr 8th, 99, 11:46 PM I installed an Optima battery in my 64 a year ago and so far the only thing that I have had to clean off of it is dust. No outgassing or corrosion. There a little pricey, but I saw one last more than 10 years in one of our company trucks. ------------------ | ||