The hi-discharge cells (>2000mA) are notoriously bad compared to regular batteries for low-discharge charge sustenance. I have Eneloops (2000mA) and while they hold their charge a lot better than standard NiMHs, for me, they still lose about half their charge in about 6 weeks in lo-drain equipment such as Superflashes, pagers, and clocks. Still, I use NiMH rechargeables for my PB Superflash - I really like to keep 'em hot.