I'm relocating my office to the basement and where I want the PC places it between the two possible power outlets, roughly 20 feet away. My battery backup units power cables won't reach that far. Why ...

Do such things exist? I finally ran a regular, 2-prong extension cable into my closet so that I could put a lamp in there (I rent an old apartment with some wierd quirks, like pitchblack closets), ...