One of the problems with these cordless drivers is the recharge time.Forget the cheap end they have recharge times of 3-5hours,put it on to charge lunchtime and its charged at teatime,completely useless.For a few quid more the mid range drivers recharge in about 1 hour.
However 😉
If its just for occasional use or for wee jobs around the house then something like this might be more your style
http://www.ukhs.tv/Tools/Power-Tools/4-2v-Flash-Cell-Screwdriver
Recharges pretty damn quick 😆
Roybi make a good range of Li-ion trade orientated tools[green range B&Q]
The beauty of that system is the batteries and charger fit into a large range of tools.
http://www.diy.com/diy/jsp/bq/nav.jsp?fh_view_size=10&fh_location=%2f%2fcatalog01%2fen_GB%2fcategories%3C{9372015}%2fcategories%3C{9372047}%2fcategories%3C{9372200}%2fcategories%3C{9392093}%2fspecificationsProductType%3dryobi_one%2b&fh_eds=%C3%9F
Theres a lot more in the range than featured here
DONT BUY ANYTHING WITH A NI-CAD BATTERY