To use that effectively you need 2 or 3 batteries. Another thing to carry.
I've seen a similiar battery powered unit. The guy used two batteries to re weld his hi lift bracket after it broke. Not sure how good a welder he was but the weld didn't last a day.
I'd say they are designed pretty much for emergency use.
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2005 CRD "
Ol' Blue"
Red Ryder carbine-action, two hundred shot range model air rifle with a compass in the stock and this thing which tells time.
My build page- RL Komodo Rear and TJM Front Bumper, armored, lifted, JBA Steel D30, 4.10s and ARB air lockers.