Originally posted by noou why? consider that I excluded hybrid Ni-Mh (e.g. eneloop) on purpose
My experience with high-capacity batteries >= 2500 mAh is that they soon develop "rapid self-discharge syndrome" in which they lose their entire charge within a few
days at most. I've had this happen across multiple brands that are otherwise associated with high-quality batteries, including Sanyo, using a high-quality single cell charger (C-9000).
The problem is that once they develop this syndrome, you get into the habit of having to recharge them just before you use them (or think you might possibly need to), and you can't rely on them to be ready at a moment's notice ("Honey, take a photo of this ...").
My non-LSD batteries that are <= 2100 mAh have not developed this syndrome. Sure, their capacity is declining with age and they lose charge more rapidly than LSD batteries, but not within a few days.
My definition of high-quality is that they can be expected to maintain their properties reasonably well for at least a year (under non-extreme conditions/usage), and I don't know of any battery >= 2500 mAh that meets that criteria.