Just bought a Battery Charger from Aldi for £3.99 with 3Yr Warranty.
This will charge up to 4x AA, AAA, C, D Type cells OR 2x 9V (rectangle shape) Batteries.
From what I can read in the book you can charge as singles or up to 4 at once (of the same type obviously) Ni CD or Ni MH
Maybe not the "ultimate" charger, but for the money and 3 yr warranty I can't see how anyone can go wrong.The charger also has a Test and Discharge function.
I bought this from the Moxley branch and they had quite a few in stock.
BATTERIES NOT INCLUDED!