Hi! TL;DR my film camera takes a 2CR5 6v Lithium battery and since the first one died out, none of the batteries from multiple brands work. Help!! This is kind of a long post. I'm new here. A year and some months ago I got a Canon EOS 100 film camera at a used camera store in Glasgow (I understand that the used part might be my problem here, but I'm remaining optimistic). When I bought it, the guy at the store popped a 2CR5 Lithium 6v battery in from Kodak. It lasted about a year and when I tried to replace it with a store brand, the battery symbol flashed. Apparently that means the battery is dead, however it's not a rechargeable battery so I just figured I picked up a faulty one. So I took the camera into a camera store/repair shop to make sure it's a battery problem, not a camera problem. The guy couldn't help me a whole lot other than to recommend to get a new battery and try again. So I went and got the same store brand as before, and it still didn't work. So I looked online and Kodak stopped making 2CR5s a while ago apparently. So I ordered an Energizer one, and the same thing happened. I contacted Canon support and the best they could say is to clean out the battery port so I did that and ordered a Panasonic battery after reading that they tend to work well with Canon cameras. This time the battery symbol doesn't flash, but the camera just doesn't turn on at all. I love this camera and can't afford to buy a whole new one. Has anyone else had this problem? Any recommendations on how to fix it or at least what to tell or ask someone at a camera shop? Thank you!!