22-03-2021 10:18 AM - last edited 24-03-2021 04:42 AM
I noticed recently my 'Screen on time' is less than 'CameraLightSensor' background time.
How's that possible? Is it still on while the screen is off? I don't use 'Face recognition' or 'Always On Display'.
What keeps it working? I don't want to switch 'Adaptive brightness' off, cause it's useful when the screen is on, but I want to stop the battery drain (or can we call it a drain at the current level?)
Please help me out.
22-03-2021 11:58 AM - last edited 22-03-2021 12:04 PM
Thanks for the reply.
For some reason, you can't simply optimize the app and put it to sleep in the background. The feature is locked, I suppose.
If so, why does the phone have to use the app in the background? What's going on over there? If 'Always On Display' or 'Face recognition' were on, I could understand, but this is confusing. Is it possible to reach Samsung representatives concerning the issue here? Maybe they can clarify... I read more than just one topic on the subject but none of the articles were giving a clear answer. Once again, 'Adaptive brightness' turnoff is not a solution. Isn't it supposed to be working properly without causing battery drain?
22-03-2021 01:22 PM in
22-03-2021 08:22 PM in
23-03-2021 01:05 AM - last edited 23-03-2021 01:11 AM
Thank you for your help and support, Jim. I will contact them shortly.
It's not a big deal actually. Usually I charge my phone twice a week, so it's not killing the battery (at least for the time being).
23-03-2021 01:06 AM - last edited 24-03-2021 03:22 AM
Hello, Ash. Thank you for the information, I appreciate it.
So the initial design of using the front camera as a light sensor takes battery life down, but I still can't figure out why does the phone use it when the screen is off. Maybe it has a delay in switching the sensor off? Well, to compare the screen time and the background time, the difference is substantial.
23-03-2021 06:08 AM in
24-03-2021 03:35 AM - last edited 24-03-2021 10:47 AM
I found another topic on the forum, a user says this wasn't an issue before the system update which was on October 30, 2020.
Before I bought my M21 I read a lot about it, but reviewers did not pay attention to this design peculiarity (though the reviews I read were published before October 30, 2020). Anyway, Samsung does not emphasize some of their phones do not have a separate light sensor, which seems a bit tricky. This is probably a glitch that Samsung doesn't pay attention to (which is weird). I suppose a separate light sensor design is better for battery life, but the front camera being the sensor itself is not supposed to act like that as well! Maybe it has to consume a little bit more than a separate sensor, but there should be a minimum difference.