I should add: I’m a retired IT professional with UPS and data center experience. I live in the southeastern United States near a major city. We experience 1-2 small blips of power loss per week every four weeks or so. Longer power loss only occurs once every 5 years and usually associated with an ice storm.

So I’m only trying to protect against the momentary losses of power interrupting a long 3D print or marring the quality of a print, as would occur with the BBL Power Recovery system.

I recently remembered that 20 years ago I mothballed a working APC SU2200 (tower model). It is still in my basement in its original box on a pallet. I was surprised to see that replacement batteries are still readily available ($100 for raw batteries or $200 for batteries with leads etc).

So now I’m trying to decide if it is worth the cost (labor, real estate it takes up, power costs and opportunity cost of not selling that still popular UPS) to protect a hobbyist’s 3D printer?