A7Rm2 excessive battery drain on standby

Ad Dieleman

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For the last few weeks I notice an increasing tendency of my A7Rm2 to deplete the battery fast, even when the camera is switched off. This morning I put in a fully charged battery, showing 100 % in the finder and after a few hours the charge was down to 82 % while the camera had been switched off.

Two weeks ago I tested my 2 older batteries (came with the camera 3.5 years ago) with a home-built discharge unit and they still had a capacity of 750 mAh, while 2 newer batteries show values around 1000 mAh. So all batteries seem to be OK, the older ones just showing 25 % less capacity.

Anybody know what might be causing this behavior? I also posted this on dpreview, as there are a lot more technically inclined users there.
 

Drd1135

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Of course, on DPR you have the statistics problem, i.e., the correct answer buried in a sea of wrong (and louder) ones. I will be very curious to hear your findings, however.
 

bdbits

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Are you using any "smart" adapters? I used to see a slight drain if I left a Techart Pro adapter on my A7ii. One of the TAP firmware updates made it much better but even then there was still a slight drain over time.
 

adwb

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Make a note of ALL OF YOUR SETTINGS then use the reset function in the camera menu last page last item and see how it goes?
 

dbmiller

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Try popping the battery out after shutting the camera off and re-inserting it. If the camera thinks something is still going on with the lens, popping the battery will break that connection.
 

Ad Dieleman

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This is the message I just posted on dpreview:

At this moment I haven't been able to reproduce the problem that the camera drains the battery in standby: I took one of my older batteries, let it sit in the camera for a few hours and the display still shows 100 % capacity left. Earlier attempts with other batteries showed the same result.
The quick drain during use may very well be the low temperatures of the last week, slightly above 0º C.
So I'm guessing I had a fluke accident, everything seems to be normal now. Everybody thanks for your help.

I did not reset the camera to its factory settings (yet). In the meantime I popped out the battery a few times, mostly to exchange a well run-down battery. I now remember that I changed a lens while the camera was still switched on, something I normally never do; maybe that caused some havoc, preventing the camera to go into proper standby. I think I also charged the battery in-camera lately and that might well be when the problem occurred, don't remember exactly.

Well, when this problem occurs again, I'll pop out the battery and let the camera sit for a few hours without a battery. See what happens next time. On another note, the reactions in my dpreview thread were on-point, polite and helpful.
 
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