I'm fighting with problem for weeks now. The camera depletes the fully charged battery completely after few days even when it's completely turned off during that time (the power dial on camera is in OFF position).
I went through many forums without clear solution for this model.
So, far I have camera in Airplane Mode on (thus WiFi and Bluetooth are off) and with GPS disabled. This happens to every battery I tried and those same batteries can sit in other canon DSLR cameras for weeks or months and still maintain their charge.
Is there anything else I can do make the EOS R6 stop battery draining when turned off (other that taking the battery out after every shoot)?
Solved! Go to Solution.
I had the same problem with my R6 batteries draining after 3 days when the camera wasn't being used. Through trial and error I found that without the RF to EF adapter (Viltrox) and lens attached (EOS EF 24-70mm f2.8) the battery's did not drain. Therefore it's either the adapter or lens that's draining the battery's. At least in my case.
I can now 100% confirm the fault is with the Viltrox adapter. At the time I bought it because Canon didn't their own in stock. I now use Canon's original adapter for few weeks and the problem with battery is no longer there.
Viltrox does not seem to plan to address this issue as such, if you are the owner of this adapter, you are left with 3 options:
* remove the adapter when not shooting,
* remove the battery when not shooting,
* use Canon's adapter or RF lenses.
Given that you have isolated the issue to the lens configuration, and you say you are using a Viltrox adapter for your EF lens, it would be worth seeing if the adapter may be the issue, as it is not a Canon device. See if you can find a Canon adapter and try that.