I claim complete ignorance in regards to rechargeable batteries. I haven't tried them for years, since the last ones I got never seemed to charge right and would deplete twice as fast as regular alkalines.

Could someone explain why these are better/worse than the Energizer/Duracell alternatives? My friend has the Energizer, I believe, and can charge them in 15 minutes. He's getting into amateur/pro photography, and he swears by the Energizers for his remote flashes, mostly because he can charge them so quickly on the way out the door.