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GreenEngineering3475 @lemmy.world

1w ago

PSA: Pixel 80% charge limit doesn't work while your device is powered off

9to5google.com PSA: Pixel 80% charge limit doesn't work while your device is powered off

The ability to limit the charge that your Pixel has an issue; the 80% limit does not stay activated if your phone is powered off.

PSA: Pixel 80% charge limit doesn't work while your device is powered off

The ability to limit the charge that your Pixel has an issue; the 80% limit does not stay activated if your phone is powered off.

19 comments

So, the OS doesn't do anything when not running?
Is the next article going to be about not being able to charge your phone from the wall if there's a blackout?
(Doing it when off is a lower level fix than what most updates can provide, I believe, and very device dependent)
- It's kind of surprising because I assumed it set a firmware flag on the charging IC, so it would persist even without the phone OS running.
  I'm pretty sure this is how Samsung phones do it.
  
  Laptops, too.
  
  Cheaper charging IC? (Maybe it needs flash to start up that way and flash costs money)

i didnt even know you could do that.
since when has that been a feature?
EDIT:
"... additions in Android 15 QPR1 – AKA the December Pixel Drop."
it helps when you actually read the article 🤦
- Since android 12 on samsung phones I think, it sounds like google took their sweet time on it

I don't think it's unreasonable to expect it to act the same even when turned off. I have something similar set up on my linux laptop, and the charging is limited even when the computer is turned off.
- I didn't know you could do that on Linux.

Has there been any proof that charging your phone to only 80% does anything beneficial?
- Yes! Fully charging and fully discharging lithium batteries stresses them. By only charging to 80%, it'll keep its capacity for longer and not need to be replaced as soon. https://electronics.stackexchange.com/a/623375
  
  At least on iPhone, charging to 80% has shown not to make much of a difference in the long run.
  https://www.macrumors.com/2024/09/24/iphone-80-percent-charging-test/
  This article explains that you are losing 20% of your battery daily by not charging it fully, only to maybe save 5% in long term battery life. (Scroll down to “should you” section.)
  https://www.howtogeek.com/how-to-limit-charging-on-your-iphone-15-and-why-you-shouldnt/

Chargie can probably solve that problem, since it's an external hardware limiter. And for those running GrapheneOS, it's probably the only option available until they get around to adding that 80% charging feature.
- That won't work either, it needs a Bluetooth connection to know the phone's charge which means the phone needs to be on.
  
  From what I read, you can set it up using Bluetooth, and then even use it for other devices like earbud cases, preprogrammed to know when to cut it off. I actually just got one, and just haven't used it yet. I'll give it a try and report back.
- I own 4 of them. I've never gotten the hardware limiter function to work. Spent too much time trying. It's basic charge limiting functions are hit or miss too. I've woken up SO many times to a 100% charged battery. I don't get responses to emails. The app is updated a lot. I really wanted these to work, but now that Graphene had the 80% feature, these will be forgotten in a drawer for a few years, then go to the trash. Good luck. Hope yours works out.
- Latest GrapheneOS comes with the 80% limit.

19 comments