Cloudy, I have the same camera as you (Canon A710IS) and the instruction book says not to use lithium batteries. Otherwise I'd already be using them! How long have you been using lithium batteries in yours, and have you had any problems? Does anyone else have this camera (or an earlier similar model such as the Canon A510) who uses lithium batteries? It uses two AA's. I think I can turn off the LED screen and use the viewfinder, but I haven't yet figured out how to do that (I'm still working my way through the instruction book), and if I can figure it out I will do so for longer trips.

I do use lithium batteries in my headlamp--I ditched my Petzl and bought a Princeton Tech so I could do so. I can't do that with the camera because it's new, it was a joint present from my children and it does take great pictures.