02-24-2019, 12:12 PM
Max: 
I will add that during the age before AGM/gel-based batteries, ye olde open cell lead-acid battery would fart off hydrogen gas from time-to-time. If one managed to arc the battery due to lazy handling of tools, there was a risk of explosion. In the extreme case, the battery could rupture and spray sulfuric acid, potentially harming the operator.
Nevertheless, shorting any battery is a bad thing.
I will add that during the age before AGM/gel-based batteries, ye olde open cell lead-acid battery would fart off hydrogen gas from time-to-time. If one managed to arc the battery due to lazy handling of tools, there was a risk of explosion. In the extreme case, the battery could rupture and spray sulfuric acid, potentially harming the operator.
Nevertheless, shorting any battery is a bad thing.
