In search of a smarter driver? Check out the Rockwell 16V MaxLithium model. Its shorter (4.9-inch) headstock lets you use it in tighter spots than you could with most 18- and 20-volt models, and its battery still provides 30 percent more run time than a 12-volt model. Even better: Two batteries are included, and Rockwell will replace them for free if ever needed. [$140; rockwelltools.com]
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