I've only got short experience with eneloops, but both things I use them in, particularly my innersoles, draw a lot of power, and at $20 for 4 batteries and a Panasonic charger I'm very satisfied with the trade-off from Duracells...as long as Murphy keeps his nose out of my business, that is.
Are Rechargeable Batteries Really Cost Effective? seems like a pretty good analysis, although the poster used Canon e6s, not Duracells.
(Apple's charger, which, for $29 [including 6 batteries, supposedly eneloops], only charges two batteries at a time, is not particularly well reviewed.)
Edit: Rather than allowing dead batteries to take up their own space in landfills, there ought to be a law mandating that dead tires be filled with dead batteries before being sent to the giant tire pile in the sky.
