vineyardman wrote:
Haydon,
I’m always learning about how these cameras work, so your info about the GPS and WiFi was good information for me. Question: By turning off the WiFi function to help prevent battery drain, does that stop the drain when the camera is “off”? That wasn’t real clear in your comment.
The main culprit from what I understand comes from the GPS being enabled. When the camera is powered off it remains active. The Wifi setting has been rooted to additional power draining. I'm unsure whether that feature has a direct relationship while the camera is turned off but logically I can see it as an additional culprit while the camera is turned on. An easy solution if Wifi is important to you is to add it to your custom menu for quick access for enabling/disabling.
This identical power drain of the 5DIV was experienced by a close friend of mine. The problem was completely alleviated by changing these two camera communication features. I found the solution on the internet for my friend. I own a 5DIII so I don't have access to further testing. A definitive answer would be to call Canon. I've called them a few times at no cost with specific concerns with immediate satisfaction. One of Canon's strongest attributes is their customer service.