: )
You are underestimating the potential current coming out of this battery.
BTW you can arc weld with a bunch of jumper cables, eight or nine car batteries and a coat hanger as welding rod. It won't be pretty but it can get you off the trail.
Shorting this battery wouldn't make an arc welder, it would make a bomb.
Electric potential turns to heat, heat turns parts of battery and bus bar to plasma...