screwylouie
Active Member
I'm not sure of the possibility of an explosion, but a charging battery will emit carbon monoxide. I found this out years ago when I had my trolling motor charging in my basement and it set off the detector and the fire department showed up..
Canadian Centre for Occupational Health and Safety
CCOHS: Canada's National Centre for Occupational Health and Safety information
The charging of lead-acid batteries can be hazardous. However, many workers may not see it that way since it is such a common activity in many workplaces. The two primary risks are from hydrogen gas formed when the battery is being charged and the sulfuric acid in the battery fluid.