Don't work harder…work smarter with the Black & Decker SmartDriver ($40). The smart design of this 3.6 volt lithium ion cordless screwdriver features a retractable, magnetic screw holder that keep screws in place for better alignment. The SmartDriver also has a built-in LED work light for increased visibility when working in dark areas as well as a six-position clutch to help prevent stripping of screws. [source]