My Z6 uses
less than 1% battery per hour, turned on, but sleeping, sitting on the shelf. The test used 4% in 5 hours. Leaving the power turned on is easier than flipping the power switch, but it's no faster to wake from sleeping than from power on. Leaving the Z6 turned on, none of my current settings will revert to a possible startup default.
I also tried bursts of 50 shots of raw+jpg pairs,
500 total, and it used around
2% of the battery. Taking images isn't a huge drain at all.
So: The screen or EVF displays seem to use most of the battery life.
See my informal test below, I got about 30% of battery drain per hour if the rear screen is left on.
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From my post in an older
Z6 battery life thread:
I read another thread where the poster didn't like the 1-2 second long wakeup time. Yeah, it can be annoying if the shot needs to be taken quickly.
I've been using
20 second sleep time settings to extend battery life. But for walking around for an hour or two, or bringing a spare battery, I wondered about battery usage with the screen staying on.
The sleeping Z6 used a bit less than 1% of battery per hour. I don't turn the switch off while I'm walking around with the camera, I just let it go to sleep mode.
Screen display battery usage
I did an informal test of a 30 minute sleep time, with the back screen on, and the camera sitting on a shelf. These are percents from the Z6 menu, there's likely some inaccuracy.
start: 68% battery.
30 minutes later: 55%. 13% in 30 minutes.
60 minutes later: 40% 15% in 30 minutes
So: about 30% of battery per hour, just for keeping the screen on.
For a couple of hours session, I'll probably set it to 10 minutes or 30 minutes "c3 Power off", not it's "unlimited" setting, just in case I forget to power it off.