Quoted:
While the Eneloops are great for holding their charge, I find that they're rather lacking in capacity for my flashlights. I don't mind having to charge my flashlight batteries ever week, but I hate my light going dead when I need it.
Honestly, there really isn't much real-world difference in run-time between a 2200 mAH Eneloop and a conventional 2800 mAH Sanyo or similar NiMH cell - and the difference quickly shifts in the Eneloop's favor after they've been sitting on the shelf for just a week or so. It seems like the more capacity they try to cram into an AA cell, the faster it self-discharges. The shelf life of my high-capacity NiMH Sanyos and Duracells is absolutely pathetic.
For this reason, I've pretty much abandoned them, in favor of 2200 mAH Kodak pre-charged cells (which are functionally identical to the Eneloops) - In my high-drain flashlights, they always deliver their advertised capacity - even after sitting on the shelf for 6 months.