Power conditioner types


Do any power conditioners actually store the energy from the outlet/power company and then generate it on demand or do they all filter the current as it is coming through?

Or is it more complicated than that?

If any do store it, are they a different class?
sokogear
Knowing very little regarding 
power conditioners...
they improve sound but do they protect equipment should
a power surge occur or are they 
possibly damaged as well?
Appreciate your input regarding
the above mentioned Decware

@bruce19 - painting won't cut it = I asked Furman about switching faceplate colors and haven't heard back...I doubt they would do it.

So if I understand this correctly, the only real way to do what I asked is to have some kind of rechargeable battery or external generator. Capacitors act like filters and can't totally clean the noise out of the electric company current. Or am I wrong and some PCs do have batteries or generators?

So the reason people theoretically pay thousands of dollars for PCs it that some do a better job (supposedly) of filtering out the noise?I thought originally that there were 2 classes of PCs, filtering ones and generating ones.

A guy from Furman said that their upper level conditioners do this, but he still said it was like filtering water and you can never get rid of all the noise, which makes me think their upper level ones don't really do it.

I know that my phono stage manufacturer, Sutherland, used to make one that was battery powered called the PhD which was popular back in the day. Not sure why he stopped making them, but it makes sense since they use so little power.
Knowing very little regarding
power conditioners...
they improve sound but do they protect equipment should
a power surge occur or are they
possibly damaged as well?
Appreciate your input regarding
the above mentioned Decware

@mbenne

Check for UL 1442 rating. If yes, then they are actually tested to protect against AC surges. If not, your guess is as good as anyone else’s.

Most surge protectors have limited lifespans anyway, so eventually they will wear out over time.  ZeroSurge/SurgeX/Brickwall are rare exceptions.