The new handheld dysons are pretty good, you get ten to fifteen mins out of it which is a long time spent actually vacuuming, its trigger operated so you can't leave it on and drain the battery. Less of a chore than having to get the vacuum out, extension cable etc, just pick it up off the charging stand and go.
I was skeptical at first but we have a dc35 as our only vacuum and its possible to do the whole unit with it easily on one charge and it has plenty of power. Decent batter.ies are the key, imagine cheap copies to have nicad or nimh cells that won't last.