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> Battery usage on Oreo
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post Sep 1 2019, 04:03 AM
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Does anyone else have an issue with battery life on their Gemini on Oreo 8.1?

Things I've noticed

- battery usage is worse than with Nougat - can not get more than a few hrs out of it
- occasionally turning itself off even when the battery has charge
- sudden battery drain - like 50% disappears in 30 mins
- misreporting battery charge - Android thinks its got 0% left and turns off, when I plug the charger in with the device off it reports 28% - its as though the OS and the battery are out of sync

It's really frustrating. It's liek the calibration and optimisation on 8 is totally out of whack...? sad.gif

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spook
post Sep 3 2019, 06:41 PM
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Over on the Gemini users facebook page a LOT of people have commented that the battery is much worse with 8.1. And many of these mention that it was pretty much immediately after upgrading. Some have even done a full factory reset and noted that they still have the drain before even installing apps. To me this indicates a couple of things:

1. It is not due to the age of the battery - or at least not solely this.
2. It seems to be widespread enough that it is related to the update, not user configs / apps installed etc.

While some have said that they don't have any noticeable change since the upgrade, to me this doesn't prove that there is not a problem with Oreo. It just shows that their particular unit / configuration isn't affected by whatever bug is causing this. There are so many variables that could be involved that it is - in my opinion - virtually impossible for us to say what might be causing it.

For example, maybe the Oreo update only causes a drain on certain frequency bands (maybe certain bands stop the unit from going into deep sleep mode), maybe a certain setting is stopping deep sleep (like having a timeout on the screen). These are obviously just wild speculations and almost definitely not the cause, but I'm trying to demonstrate that - despite many users not experiencing it - this battery drain may very likely not just be due to software installed or user settings, but actually a bug with the update.

I've certainly seen enough posts about it to make be believe there is an issue and to postpone the upgrade to 8.1 on my device.
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Kero
post Sep 21 2019, 04:37 AM
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From: the Netherlands
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wifi-only model, and I have the feeling of a faster draining battery too.

Bad wifi is really sucking power when the unit is not doing anything. up to 20% overnight.

Switching off wifi and allowing the screen to go dark before clsing, however, makes my unit survive the night with a reasonale 1-2% or so.

My hyopthesis: fancy power saving mechanisms in Oreo that require support from the kernel.
Our kernel is to old to provide those hooks/api, or perhaps the hooks/api are badly implemented.
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