p.1 #1 · Canon 5D Mark IV very fast battery drain in stand-by
Just wondered if any of you encountered this issue (I will take it to a service facility, but wanted to know similar issues):
Camera has 95k clicks and the battery drains very fast: at 2-4%/hour rate. Tested with three batteries, one brand new and with different lenses. Of course, no WIFI/GPS active. It basically drains completely overnight. Before all this I left it unused for 3 weeks, then connected to my laptop to check the shutter wear using a free program (Tornado).
If the camera is set to Off or I set the Auto Power Off to the minimum setting (1 minute) there is no drain. So it's definitely a camera issue.
Have any of you experienced these drain?
p.1 #2 · Canon 5D Mark IV very fast battery drain in stand-by
Yeah, I’ve actually run into something similar with mine not too long ago. Same kind of drain, even with good batteries and everything turned off that could be a culprit. In my case, it ended up being a fault in the main board causing some kind of parasitic draw when the camera was just sitting idle but still technically “on”
Jul 20, 2025 at 10:50 AM
FotoMayron Offline • [X]
p.1 #3 · Canon 5D Mark IV very fast battery drain in stand-by
The clue for me too was that it didn’t drain at all when switched fully off or set to auto power off. Service tech confirmed it after some testing. I’d say you’re on the right track taking it in, could be something internal like a capacitor issue or a stuck circuit keeping the camera in a semi-active state. Curious to hear what they find on yours.
Jul 20, 2025 at 10:56 AM
AmbientMike Offline • • • • • • [X]
p.1 #4 · Canon 5D Mark IV very fast battery drain in stand-by
I had a Rebel that might have had a short in it, but it didn't drain nearly as fast as that overnight. And if it's not having issues in the fastest Auto Off setting I don't think that sounds like a short, to me.
I usually leave it on the shortest Auto Off setting anyway. I needed the camera to stay on longer once, 4 min really drained the battery fast, compared to normal imo
p.1 #5 · Canon 5D Mark IV very fast battery drain in stand-by
FotoMayron wrote:
The clue for me too was that it didn’t drain at all when switched fully off or set to auto power off. Service tech confirmed it after some testing. I’d say you’re on the right track taking it in, could be something internal like a capacitor issue or a stuck circuit keeping the camera in a semi-active state. Curious to hear what they find on yours.
Thank you, I will be doing more tests in the next days and see how it goes, before taking it to a service facility.
p.1 #6 · Canon 5D Mark IV very fast battery drain in stand-by
AmbientMike wrote:
I had a Rebel that might have had a short in it, but it didn't drain nearly as fast as that overnight. And if it's not having issues in the fastest Auto Off setting I don't think that sounds like a short, to me.
I usually leave it on the shortest Auto Off setting anyway. I needed the camera to stay on longer once, 4 min really drained the battery fast, compared to normal imo
I don't think it's a short, either. Mine always had the Auto Power Off set to Disable, but I usually turned the camera off if left unused. Some say that it could be an issue with the internal battery.
Jul 20, 2025 at 03:02 PM
AmbientMike Offline • • • • • • [X]
p.1 #7 · Canon 5D Mark IV very fast battery drain in stand-by
Uarctos wrote:
I don't think it's a short, either. Mine always had the Auto Power Off set to Disable, but I usually turned the camera off if left unused. Some say that it could be an issue with the internal battery.
Is the camera powering off or maybe the shutter release is sticking, perhaps lens remains on powering IS?
The internal battery shouldn't matter but the Rebel had been left in heavy rain and the capacitor they apparently use was ruined, had to reset the time every time the battery removed so maybe?
If using 1 min fixes it I might just do that since that's the way I do it anyway. Mine is probably on 30sec longer times drain the battery.
p.1 #8 · Canon 5D Mark IV very fast battery drain in stand-by
The time/date is always spot on, even when the battery was removed, so I think is safe to say that the internal battery still works. I've also tried it with a non IS lens (35L) to eliminate any IS related consumption.
The 1 minute setting seems to fix it, at least for now.
