On a similar note, I discovered some interesting details regarding rechargeable Lithium-Ion batteries -- NOT the NON-rechargeable Lithium Energizer batteries.
The instructions from Minolta for the very common BP-400 rechargeable Lithium-Ion battery states:
Never store a fully charged battery -- that's problematic, because I will typically charge two or three for an outing, but often only need one or two -- and have one or two fully charged left over that I have to "store" for a later date. They don't say what the problem there is with "storage". Since I typically leave a charged battery in the camera, isn't that storage? And if I remove the charged battery from the camera, isn't that storage? Again, they never define "storage" -- I assume it means charged but not used for an unspecified period of time (in or out of the camera).
Stored batteries will eventually discharge, and if fully discharged may no longer be rechargeable -- so charge batteries for at least five minutes every six months. This is something I can put on my calendar, but kind of a nuisance.