I have an Elu (now DeWalt) 12v Combi cordless, about 12 years old.
Anyways, both batteries are finally knackered.

Looking for replacement batteries, I see it's going to cost me at least
£60 for a couple of cheapos, whereas a visit to B&Q this morning
showed me I could get a Makita 12v "marathon" cordless combi for £83
(including 2 x 2.0Ah batteries), a Ryobi 18v (with 2 batts) for £63 or
a MacAllister 14.4v (2 batts) for £60.

Given that I really only need my drill these days for the odd job (the
extension is finished!), can anyone recommend the best course of action
and - if it involves buying a new drill - point me to a good choice?