We have a one year old Canon Powershot A80. Recently the batteries have been draining quickly for no apparent reason. We've tried brand new batteries, but even after one or two uses, when we turn in on a week later, we either get the "change batteries" message, or it doesn't power on. Of course our warranty ran out a month ago... any ideas? We've tried severals sets of batteries and chargers, cleaned the contacts, reset the camera's setting, and swapped the memory card.

Has anyone had this problem?

Thanks!