« on: August 12, 2014, 01:15:18 PM »
Battery geometry can be a big issue. That little nub on the positive end varies in length from AA type to type. Some electronica will accept them all, but some have a barrier that stops the short nubs from making contact. I had this issue with electronics I import, some batteries would not make contact.
However, that obviously is not Jims issue.
Battery geometry shouldn't be a big issue. It's not exactly rocket science to design a battery holder that can firmly make contact with a battery given some tolerance. I just don't see it as a complicated design requirement, and certainly not for a $600 piece of equipment. As to applicability to Jim's issue, I agree, this shouldn't be the cause of it, but it is what's stated in the instructions for the 600ex. And every time I've heard of similar complaints with the 600ex someone puts alkalines in and the problem goes away. So either Canon poorly designed the battery contacts, or they put some fluff in the labeling instead of design a battery indicator that can handle various rechargeables.