[underscore]

Long story short, which brand has the best long-term support of their battery powered products, and the best cross-compatibility between devices? I keep my stuff a long time, and I loathe the old style where everything has a different battery.

I want to be able to buy something in 5 years without having to get different batteries for it and end up with the same shelf of chargers I have now. As my current gas/120V/air stuff dies (if it ever does), I'd like to replace it with stuff that uses the batteries I've already got. Which would be, in no particular order:

- lawnmower
- weed wacker
- impact gun
- drills
- leaf vac

These I don't mind keeping 120V, but if the bare tool costs about the same I'd go battery powered:
- sawzall
- circular saw
- angle grinder
- air hammer (do they make electric ones?)
- hedge trimmer

Right now I'm mostly a Makita guy, I've got some really old 120V stuff from them that still works flawlessly, but I've got DeWalt and Black and Decker drills too. I know Milwaukee is quite popular but aside from some drill bits I don't own anything from them. I don't give a hoot about brand names and I don't like paying extra just for a name when it isn't actually any better. I rarely get to work on something for more than a couple hours so being able to quickly charge a battery part of the way is more important than total battery capacity.