Canon Battery

Originally uploaded by Moose408

This may be common knowledge but I just figured it out today. The battery cover that comes with Canon batteries had a small hole in it that shows the underside of the battery. By rotating it, it can show blue for a charged battery and gray for a discharged battery. Who knew?

I’ve been using this cover for over 3 years and just now figured it out. It might have been in the instructions, but who reads the instructions for a battery?

Anyway I thought I would share in case there was someone else out there who hadn’t figured this out.