They sell like crazy every time we(ncix) have them on sale. Never used them myself. Don't think they last any longer than regular AAs under heavy use, just that they discharge very very slowly if not used. Could be wrong anyone want to correct me?
When you say reg AAs you mean regular NiMH correct? If you are referring to alkaline AAs are regular AAs, these eneloops will run circles around alkaline batteries in heavy-demand devices.
They don't last longer. They last shorter, regular nimh can have higher capacity, the only upside to eneloop is they self discharge slower.
Yes, if the regular NiMH had a great capacity than enelopps 2000mA hours then it would last longer (take more pictures in my case), if the batteries were both discharged at the same time, or a least within a week.
With me, I would never shoot enough pics to discharge a set of batteries in one day so when I was done and put my camera down for 3 or 4 weeks then my regular 2500 to 2600 mA hour batteries would be near dead after a month. But with these eneloops, even if I shot enough pics to reduce the capacity to 1/2 charge, I would still have more juice left after a month with eneloops then I would with the regular NiMH batteries.
Basically, I had to recharge all my NiMH once a month to keep them fully charged. With the eneloops, I can go 6 months to a year and never have to touch them. Just grab my camera with the 2 sets of eneloops and I am good to go anytime.