Bought a Milwaukee 2803-20 M18 Fuel 1/2" Drill/Driver (Bare Tool)-Peak Torque = 1,200 in-lbs for a crazy $138 from Amazon a couple days ago. Today the price is in the vicinity of $300 for that drill. I'm a Milwaukee tool guy and already have chargers and batteries. Have a couple of 5 a/h batteries but then I went shopping on Ali Express and bought a 9 a/h battery for $60
I've bought the knockoff batteries before and years later they are holding up as good as the OEM batteries.