Review on Upgrade Your Milwaukee M12 Tools With Waitley 2 Pack 12V 3.0Ah Replacement Batteries: Get More Power And Capacity For Your Work by Kulwinder Hendrickson

At first I thought I hit the jackpot saving some $ with these. But Vs. the real Deal when I use in 12volt small impact gun driving a 10x1 into WOOD IT BOGGS DOWN and STOPS POUNDING. I then switched out this knock off Waitley brand to the real Milwaukee 12 volt 1.5 amp battery and The problem was gone. Got screwed out of the return of course. Maybe Ill use them in the heated jacket and pray they don't catch me on fire! Because they sure DO NOT work well in 28 degree weather in Pittsburgh, and there's a lot colder places that Pittsburgh so You may want to stick with the real deal and get ripped on the Milwaukee price. These knock offs seem ok in the Lights so far, but not tested in 28 degrees in the lights.