Oh, interesting. I'd read that Energizer's charger was for use with standard NiMH cells.

IME/IMO, one would do best (in terms of cell condition and longevity) with Maha chargers. For standard NiMH cells, their PowerEx brand are really good and deliver real-world capacity to match their rated spec. For slow-self discharge (which I pretty much use universally now), I recommend Sanyo (readily available at Costco if you have one in your area) and I've also heard good things about Maha's brand, Imedion.

The new Maha 8-cell charger can even handle C and D cells if you want to buy any of those now or in the future - they take a bit longer to charge, as they have much higher capacity than AA cells. If you have kids, you know that D cells are still in fairly wide use. C cells not so much I suppose. A AA in an adapter also works, but won't last anywhere as long as a real D.