For the record, it's convenient to have a "dumb" charger of some sort in addition to the Maha, because it can't really revive dead (totally discharged) cells.

The Maha will refuse to charge any cell that's under 0.5 volts or so -- it'll just say "null" as if there was no battery in that slot. So you put the dead (you left it in your flashlight and left it on for a few days, for example) battery into your dumb charger, let it charge for five minutes, THEN put it in the Maha and it'll charge it. You might have to cycle it once to bring it fully back to life, but that the Maha can do.

Unlike LiPo/LiIon cells, fully discharging NiMH cells doesn't really damage them. (But there is still room to damage them if you have two or more cells in series, and one cell has less capacity than the rest, so it goes dead first, and then as the discharging continues the other cells reverse charge it, which can make it even weaker (i.e. damages it.) This is the reason why you don't want to let your NiMH or NiCd cells go too low -- but there's no reason not to revive them after that, and the Maha is good at that (once you get the voltage back up a little bit.))

I'm just saying this just to make sure that if somebody does gets the Maha and it won't bring a battery "back from the dead" -- that doesn't mean it's time to give up.