If for a flashlight, I'd go with the ones gutbucket recommends. even at 800mah, they're comparable in output to alkaline aaa batteries and would demonstrate comparable shelf life to alkaline aaa batteries. In other words, if you went with "normal" nimh batteries and hadn't charged them for a few weeks , the batteries' self-discharge "feature" would likely have eaten much of their underlying capacity and cause the flashlight to die pretty quickly (regardless of mah rating) -- otoh, with the slow discharge batteries, you'd be a lot closer to the initial charge capacity and would enjoy a brighter life . . .