Thread: What uses more juice, default mode or dark mode?
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Old 09-24-2020, 05:38 PM   #13
j.p.s
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Quote:
Originally Posted by JSWolf View Post
It takes more power to switch modes. But once switched, it should take the same as it would be the same changes after that. But there is one difference that I've found. I've found that in night (dark) mode that the light needs to be at a higher level then it does iday (normal) mode. That will take more power.
Quote:
Originally Posted by DuckieTigger View Post
I would say dark mode uses more power when reading in low or no light, because it needs more front light to create enough contrast. Normal only needs enough light to make the white background visible.

I concur with Jon in last post. Also the front light is always on on Oasis, cannot be turned off in dark mode.
Switching modes uses more power, but that has nothing to do with power use in a mode.

For some people, light setting #1 is too bright for reading in a dark room. For them, dark mode would not use more power unless Setting #1 is too dim in dark mode.

I agree that the screen is darker in dark mode and might require setting the light higher.

I measured Voyage battery drain versus light level a couple of years ago and it was pretty much impossible to tell any difference between levels 1 - 6. I'm sure the drain from the light is more than 6 times greater for level 6 than for level 1, but all the other things draining the battery on the Voyage just swamp them out.

https://www.mobileread.com/forums/sh...d.php?t=293683

The KOA2 light draws more power than the Voyage light, but I bet the difference in the first 4 levels is tiny compared to all the other drains.

Almost three years ago, I compared Voyage and KOA2 brightness at many light settings in a dark room, with the KOA2 in both mormal and dark modes.

https://www.mobileread.com/forums/sh...d.php?t=292336
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