For years, I've used a B&D electric screwdriver. They last about 18-mos, then will not hold a charge. The B&D torque is also puny compared to this Stanley product. This Stanley screwdriver holds a charge for really tough jobs too (I've removed truss and deck screws w/it, and it just keeps going!) The battery charge longevity, of course is dependent on the job being accomplished, BUT it lasts at least 3x as long as a B&D, It's adjustable handle and Fwd/Rev rocker button are really positive features.
All Carpenters and handy-guys and gals need one of these in the tool apron.

This cordless screwdriver is super simple and easy to use (duh).

Does what it claims.