Although it will never replace a cordless drill in terms of speed of driving/removing screws, my trusty Snap-On ratcheting screwdriver requires no batteries and is far less cumbersome in both weight and size. And for a 1- or 2-screw job is actually faster.
This unit has a smooth-action, incredibly durable RATCHET action that will send the shaft merrily cranking in whichever direction you desire with a flick of the easily rotated ring. It can also be set in the fixed, non-ratcheting position. I have tried another ratchet screwdriver and found the action laughably rough with plenty of slop. The stainless shaft on the Snap-On is magnetized and bored out in the end to accept the standard hex-shaped bit tips. A durable plastic cap screws into the butt of the hollowed-out handle and has a gasket to keep the interchangeable bit tips that rest inside moisture- (and therefore rust-) free.
[Please see the more recently-reviewed (and significantly cheaper) Klenk Ratcheting Screwdriver. -- SL]