I bought a Canon A80 three days ago. It is my first digital camera which I intend to use in my future travels. It replaces my old Nikon 8008S. As I read the User Guide, I came accross this statement, "Never use manganese or lithium batteries, as these battery types may overheat in the camera". The Sales Associate where I bought the camera and batteries suggested I use these batteries because they last much longer. They are not the rechargeable type. I called the store where I made this purchase and the Sales Associate stated that I could absolutely use this type of battery.
Is this a 'CYA' statement from the manufacturer, or is it a valid warning?