The normal UPS doesn’t really do much. A UPS + a tool with a UPS conversion seems to drain at the same rate, so basically a normal UPS is just a battery storage. Same with an advanced UPS, with a bigger capacity.
The pretty dang rare UPS CBM is much more efficient though, if you got a decent amount of power storage and joint torsion and other power generating bionic. You pretty have infinite ammo with laser pistols, and the power use is cheaper. A tazer that costs 100 batteries to use only costs 10 bionic power, and so far the mp3 player uses so little power that I can keep it activated all the time.
Basically, UPS bionic + any tool that can be modded with the UPS = infinite use without searching for batteries.
Seriously. It only takes one bionic power to use a modded electric jackhammer.