This is what I'd recommend if you're doing only AA (and/or AAA) batteries.

Maha MH-C9000 Charger at Thomas Distributing

Here's a partial description from the site:

The MH-C9000 Wizard1 Battery Charger & Analyzer. Suitable for the casual consumer users, enthusiast and professionals, the MH-C9000 is capable of charging, conditioning, analyzing, cycling, forming and discharging one to four AA or AAA batteries, all while digitally displaying the battery capacity and voltage. All four slots can be operated independently in different modes and settings. A total of five modes are available.