Even if you stick with one system, all those combo kits and bonus bundles scored during sales will pile up--big time. The worst offender is the adapters Walmart uses on the 12V Hyper Tough stuff. They are useless once you have the fast charger, and every tool comes with the power adapters that take all day to charge one 1.5 amp battery. They don't have such a thing as a bare tool option. Kind of wish they went the Harbor Freight way--starter set of battery+charger, bare tools, and individual batteries.