I bought a DeWalt cordless tool years ago. Ended up sticking with Dewalt because batteries are not compatible between different brands.

Honestly surprised nobody has thought of selling an adapter. I could see this working well for contractors of different trades. 1 contractor uses Dewalt, but another uses Milwaukee. That’s okay, just bring the adapter and you can borrow the battery from that person(s) regardless of their brand affinity.

I’ve been pretty happy with the Kobalt 24V Max tools. I’ve got almost every tool you can think of, tons of batteries, and have been 3D printing wall mounts for them.

Makita for battery-powered tools.

I use Dewalt since it was gifted, I like then a lot so far.

Torque test channel is a goldmine of information if looking to buy.