I have been using the Babyliss Suoer Clipper for the last year or so for cutting my own hair. They are cordless and the battery must actually be nuclear powered as it lasts forever between charges. Im really impressed by them.

http://www.amazon.co.uk/BaByliss-Men-Super-Hair-Clipper/dp/B007520KCE

A man who shaves off his beard for a woman, deserves neither!