Quote:
Originally Posted by BASSMAN
The gas coming off the batteries will explode if there is a spark, usually the water level will be down because of the internal short, safe way to avoid it to fill the battery clear full with water and allow the gas to dissipate before you disconnect, wear gloves and a face shield for added safety, battery acid can blind you.
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The charging current is electrolyzing the battery water...water will break down into hydrogen and oxygen, and the two together are very explosive. Be careful. If you check the electrolyte in the battery cells (I'm assuming a flooded type battery) you will find the level is down for one or more cells.