I am having issues with the camera saying the battery pack needs to be charged. I have replaced my four batteries several times, and it keeps telling me this. I misplaced my manuel, therefore this is why I a writing. Does this camera have a hidden small battery, like a circular one that I am not aware of that needs to be changed? I have had this camera for five years. Always working until now with this coming up on the screen and I have never encountered this before. It will get a little blurred too at times while looking through the viewer, then shut down. So I am not sure if my camera is just getting old, or what. It has not been in extreme heat or cold, it has always been well taken care of too. Thanks for your help.