Camera shuts itself off when I press the button to take a picture.

My Canon A610 turns right on and seems to be working. Then when I press the button to take a photo, it turns the camera off. The low battery icon is not lit. I've tried more than one cards in case that is the problem (It isn't). I've tried different settings (Auto, Portrait etc.) but it does the same thing with all of them. It was working with no problems up until right now.

Thanks, Judi