1/2 cordless impact opinions

I've had a M18 Milwaukee 1/4 inch impact and 3/8 inch hammer drill for about 6 years now, bought them after seeing the Dewalt tools that co workers were using that were problematic. Only problem I've had was brushes on the impact needed replacing after 3 years of heavy daily use, cost me about $70.00. The thing has taken a ton of abuse and never failed, planning to get a 1/2 inch one in the near future.
I got a set with 1/2inch hammer drill and a small impact driver over 10 years ago when I built my deck. Love them! After a lot of use and abuse over the years I had replaced the brushes and switch in the drill. While both still work good, I mentioned to my wife I didn't know how much longer the dill would last. Got a new set plus 2 saws for Christmas. They are even more powerful and smaller than my old ones!. Would love to get a 1/2 impact...
Since this was brought back from the dead.......we have two Milwaulkee drills at work. Both the 18v lion battrees. I am not impressed with either. At all. The battrees don't last worth stink. Every time without fail, even right off the charger, neither of them will last through one project. Just not impressed.
Probably just worn out batteries. My original 10yr old batteries are nowhere near original, but will still run a whole mess of screws on a charge.