According to Wikipedia, 'A power trio is a rock and roll band format having a lineup of guitar, bass and drums, leaving out the second guitar or keyboard that are used in other rock music quartets and quintets to fill out the sound with chords.'
According to TV Tropes, a power trio is a trio.
I know this has been brought up in the past, but now I'm making the proposal official: Rename 'Category:Power Trio' to 'Category:Trio', fix the links, then rename 'Power Trio (music)' to 'Power Trio'.
If it happens, this will take a while to do.
Any objections?