the best charger i have is a 10 years old Maha lookalike. It charges in pairs, but it has the recondition feature, which seem to do something. seriously, the fast then trickle feature puts more juice in my batteries, and it works with cells other charger can't handle (useless radioShack charger)
but i got into LED flash lights a few years ago. for some reason they all use 3 cells. I got multiple such flash lights over the years, which is the reason i also want a charger that works with 1 cell at a time. the Energizer was great until it self-destroyed. I have high hopes for the Maha MH-C401FS. For some reason it's sold out everywhere. There is a clearance sale at CanadaComputers. I'll grab one tomorrow. I'll let everyone know how well (or not) it works.
I'm into chargeables because I use them in cameras, dSLRs, flash lights, kid's toys, radios, and a mp3 player that lasts 8hr on a single AAA. All in all, high drain devices. I use alkalines in remotes, because a pair last many months. I use lithium in wall clock. 1 AA lasts 3-5 years.