This is a power saving device that colects power spikes and will store the power in capacitors. Thies advanced capactors store the power until there is a new power load like turning on your welder. Or air conditioner ? (this has nothing to do with your computer).

Can you provide a link to this product? Just based on your description, I call B.S.

Capacitors store charge or energy, not power. Power can be derived as they are discharged. I'm also thinking that since most voltage/current spikes are of such short duration, that there just aren't enough of them to buildup enough energy to power anything, particularly a high current device such as a welder. The capacitors would also be huge.

SCAM. These things are ALL scams!

Do NOT believe any of the hype about them, no matter how convincing.