While supplies last, at Ohio Power Tool you can get a Free 3^rd Battery instantly with the purchase of the CLPK40-180 ($475) or the CLPK50-180 ($550) combo kits. The CLPK50-180 is actually the CLPK40-180 kit with the Impactor 25618B, but for only $75 more it’s one great deal. The free 3^rd battery ships right away with your tool (no mail-in rebates) and is the light weight slimpack BAT609 ($77) which is great for the light, impact, and many uses of the hammer drill. Bosch is also the only major tool brand that allows any of the 18V tools to work with both the slimpack or fatpack batteries.