I should know the answer to this question. In fact, I think I do know the answer -- I just don't like my answer.
The small Canon digicams have small rechargeable batteries and small chargers. It sure is convenient to leave a charged-up spare battery in the charger and pack the assembly in the camera bag. Is this OK?
I've actually been doing this frequently for the past ten months. As far as I can tell, it doesn't affect the battery at all. Of course, I haven't actually taken any measurements but the battery seems OK. Still, every time I leave the battery in the charger, I feel uncomfortable.
Anyone else doing this?