Rechargeable lithium batteries have a drawback. Apparently many of them have a short shelf life -- not due to self-discharge, but due to irreversible aging from internal oxidation.
Isador Buchmann (Battery University, Cadex, online battery book) discusses this in some of his writings.
Some lithium batteries may be better than others. Toshiba is among the companies that seem to be working on improved designs. Someone said that Toshiba (and possibly others) have some lithium batteries now that have much longer useful lifespans.
Does anyone know where these or other longer-lifespan lithium rechargeables can be purchased?