Christian McArdle wrote:
The nice variable speed mains drill gets pulled out if more
than a hundred screws need screwed in, or if many big holes need drilled.

It's got to the point where my old mains drill is only used to stir cement.
The battery drill does everything, except things reserved for my SDS drill,
such as removing tiles, general demolition and anything to do with masonry.

Yes, that's pretty much where I am. I have a couple of cordless
drills, an old[ish] Skil 12 volt one and a new Bosch 9.6 volt one.
These two do 99% of screwing and light drilling. For making holes in
the walls (which are hard in our house) I use the SDS drill.

--
Chris Green