I'm already heavily invested in the Milwaukee battery platform but if I wasn't I'd be looking very hard at the Hercules line from Harbor Freight. Their high torque 1/2" drive impact wrenches are equally as impressive.
Harbor Freight seem to be (compaired to their traditional tool lines) going leaps & bounds with the better brand lines. I'm still cautious of what I buy there cause you get what you paid for (cheap tool=cheap quality) but I'm getting hooked on the Icon wrenches & if it was for my investment into my cordless Craftsman tools I would be looking at the Hercules stuff.Some of their stuff is shockingly good. I recall their Earthquake XT air impact guns doing extremely good on various reviews.
You could always try and find a battery adapter between your Milwaukee stuff and that.
I interoperability of batteries is always my issue. I using Makita for my weekend shade tree mechanic garage since I have multiple lawn equipment that is also Makita. They are not cheap and the batteries are expensive but I have some that are over 4 yrs old that a holding their charge time pretty well. Food for thought: If you can't afford the time and $ to work on a rounded off bolt head or broken tap going cheap will cost you specially if you are a working mechanic! I have a bunch of expensive wrenches, ratchets, extensions and tap & die sets and socket sets that I stole from my dad decades ago and are still as new as the day he got them.
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