Improvised welder from battery charger / starter box?

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e9999

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had a wacky thought

I have a battery charger / engine starter. Industrial size (like a large flight carry on bag). Says 200 A on it (although the ammeter only goes to 40).

Would it be possible to use this for stick welding in an emergency without burning it up? 200A is a lot.

It's probably 20y old or so. Century. Took it apart once and there was very little in there except for an enormous very heavy transformer of some sort and I imagine some big rectifiers (don't recall). I don't recall seeing any ICs.

What do you think? I imagine even if it doesn't burn instantly, the duty cycle would have to be kept very low if it's designed just to start an engine. No fan that I recall.
 
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Probably not a high enough voltage to sustain an arc, but why not give it a try and see.
 
ah, yes, right you are, likely. 14V or so. I guess they put 2 batteries in series for a reason to arc weld on the trail, eh?
 
Yep, too low voltage and duty cycle to be useful.
 

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