EOS R1 draining battery when off

[fgphoto]

I am noticing an issue with one of my R1's that it seems to be draining the battery when the camera is off. A couple of times I noticed that one of my cameras showed a partially drained battery even though there were 0 shots on the battery and the other camera's battery was still showing fully charged. I have both cameras with GPS on setting 2 with a 30 second refresh, and no network connection (but not in airplane mode). 

To test this, before heading out of town on a short holiday, I put two fully charged batteries in the cameras (both showed 100% charge in "battery info" and were different batteries from when I noted this before.) When I returned home three days later, one camera still showed 100% and the other camera showed 92%. 

Typically they have the 24-105 f2.8 Z and the 70-200 2.8 Z lenses attached. The only other thing I can think of is some sort of parasitic drain from one of the lenses? I guess the next step is to store them without lenses attached and see what happens. Has anyone else had a similar experience?

[Waddizzle]

Do you turn the cameras off?  

Does “no network connection” mean all wireless communications are disabled?

What happens if you disable the GPS if your camera is not needed for a few days?

[karmlol]

I've noticed the same on my R1, but only after I enabled GPS (mode 2). Although the manual suggests that turning it to "off" should stop it receiving signals in that case (except if it went into "auto power off" with the power switch still set to "on").

I've not done extensive investigation into it, it could also be related to those lenses you mentioned, am not too sure.

[karmlol]

I think I figured out the cause of this.

I just checked, and it still drained with my RF-adapter EF 100mm Macro lens, around 8% in 2 days or so. For me, that rules out the two Z lenses. The camera was fully powered off. GPS was in mode 2 (I verified), airplane mode was NOT on. I only started noticing this issue once I had disabled airplane mode, though (I figured that I'd experiment with battery life using GPS, as it's kind of a neat feature if it's not disastrous to battery life).

The main giveaway is that when the camera is turned off, the top LCD screen stays enabled. I know that screen doesn't draw much power; however one of the icons shown on the top there is a bluetooth icon. So I did a very simple experiment: switch my camera off (with the switch in the "off" position), and try to connect to it with my smartphone using the Camera Connect app (having already linked with it in the past). Lo and behold: the camera shutter makes a noise and I am able to connect to it.

That means that bluetooth has to be running in low power mode to listen for bluetooth connections in some way or other. I'm willing to bet that bluetooth is the cause of this battery drain, and that disabling it (or enabling airplane mode) will stop the battery drain.

Let me know your results.