I bit on the two batteries get a free tool deal twice, got a 3/8" impact (perfect for changing blades on my riding mower) and a Jig saw. As if that wasn't enough I went back for the 6pc Ultimate Combo that was going for $199, older brushed tools but good enough for my uses.
The 6pc kit came with the green charger, it was less than 10 minutes faster on a 3AH battery over the small black charger that came in the 2 battery kits.
With six batteries and three chargers on my bench I'm looking at the Supercharger.
I've given up on staying with one platform. I have Dewalt 18v (drill, circ saw, RA drill, 1/2" impact) and 20v (drill and impact driver), using 20v adapters for the 18v tools. Ryobi 18v One+ and Ryobi 40v (string trimmer, BP blower, hedge trimmer, chainsaw). And a lone Rigid 18v 1/2" impact. The upside of this mess is that I can pick the best tool out of those systems. Yeah, it's not pretty
