How To Guide How to limit charging on Pixel 6

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boe323

Senior Member
Jun 22, 2012
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Burton on Trent
If you would have read the correct information on this subject. You would know that this not true for today's battery technology.
This is nothing but a myth.
You will have a better chance looking for Bigfoot.

Why waste 40% of your battery use....
the 20% is use li-ion batterys, dropping below 20% (if the battery is malfunctioning) can lead to swelling, but its best practice to charge your phone around 15/20%, the 80% thing is just a myth. storing li-ion batterys should be around 40/60% though
 

WibblyW

Senior Member
May 24, 2011
723
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Google Nexus 4
Moto X Play
the 80% thing is just a myth
Do you have non-anecdotal evidence for this? All I've seen is evidence to the contrary...
  1. the often quoted 'Battery University' data https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries
  2. various phone manufacturers slowly introducing various strategies to limit the time the battery spends above 80% e.g. https://support.google.com/pixelphone/answer/10011133?hl=en#zippy=,optimizing-for-battery-health-pixel-later,get-the-most-life-from-your-battery,charging-temporarily-limited-pixel-later
If fact I've NOT seen other than anecdotal evidence that discharging to below 20% before a recharge IS a problem! All I've read (sorry can't find a reference) is that the reason to keep the battery at 40% in storage is to stop it discharging too soon to the point where the battery's protection circuitry doesn't get power and stops the battery from charging at all. This is actually below the battery's 'indicated' 0%. And an indicated 0% still leaves enough charge in the battery not to damage it chemically.

Either way I would say don't obsess about it, but keeping the battery between 20 and 80% can only improve battery longevity whenever 60% of its capacity can get you through the day. This in my case is frequent given, like many, I now work from home. I will charge it up more when I know I'll be out for the day, though to be honest with in-car charging if I'm driving I find I'm often not using even 50% of the phone's battery capacity in a day... What have you got to lose by doing this anyway? All this just means I hope I won't need the hassle and expense of a battery replacement whilst I have the phone (3 yrs probably) and even then I will have nearer to 100% battery capacity on those occasions I actually need it.
 
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WibblyW

Senior Member
May 24, 2011
723
127
Google Nexus 4
Moto X Play
Another interesting point is that (at least according to the Battery University page above) "The worst situation is keeping a fully charged battery at elevated temperatures."

That's exactly what happens when you use a phone for navigation attached to the windscreen in a car on a hot and sunny day and have it sitting, potentially for hours at a time, at 100% plugged into a car charger. And you'll probably get even more heat if you happen to be using a wireless charger :-( Another good reason to limit charge level and, perhaps, temporarily halt charging whilst the phone's temperature is too high. All sounds complicated, but if an app can automate it all...
 
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NCVol

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Jul 15, 2022
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I have this working for me on a rooted P6 and it’s pretty easy to do. I just installed AccA from F-Droid. The ACC module in Magisk showed v2022.6.4 by VR25. In settings for AccA I clicked on ACC version and changed it from bundled to v2022.6.4. Rebooted and it’s working.

Hopefully that helps someone else struggling with it like I was. With the bundled version selected in AccA the Daemon would stop running but I haven’t had that happen yet with the version changed.
 
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    I have this working for me on a rooted P6 and it’s pretty easy to do. I just installed AccA from F-Droid. The ACC module in Magisk showed v2022.6.4 by VR25. In settings for AccA I clicked on ACC version and changed it from bundled to v2022.6.4. Rebooted and it’s working.

    Hopefully that helps someone else struggling with it like I was. With the bundled version selected in AccA the Daemon would stop running but I haven’t had that happen yet with the version changed.
  • 11
    If you would have read the correct information on this subject. You would know that this not true for today's battery technology.
    This is nothing but a myth.
    You will have a better chance looking for Bigfoot.

    Why waste 40% of your battery use....
    On the contrary. The most recent phones attempt to limit the time that they spend at 100% exactly because it's so bad for battery longevity. Having options like the OP's approach just gives users more flexibility, should they want more control than, in this case, Google's adaptive/AI approach.

    And it's not 'wasting' 40% of the battery. Keeping between 80% and 20% just optimizes battery service life during those days you only actually only need 60% of it's possible capacity. When working from home that's often the case for me. I actually tend to use ~30% of the battery in a day. Better to charge it up daily to about 70% than all the way to 100% and let it go down to 10% over 3 days. If it's easy to do, why not?

    Not quite the same, but EV design also has their batteries normally operating in the middle range so as not to compromise their service life...

    Definitely not myth. The only myth is that lithium cells exhibit a memory effect and need to be deep discharged and fully recharged periodically to maintain their capacity. It's actually bad for them to do this! The only reason to do this would be in an attempt to recalibrate the software for the battery level gauge (at the cost of a little damage to the battery each time you do that).
    5
    If you do some reading you will see that charging over 80% and draining under 20% will significantly shorten the lifespan of your battery. This is important for those of us that have devices not sold in our country so getting replacement batteries would be very difficult and expensive. I have phones that are more than 9 years old and still going fine if charged like this.
    If you would have read the correct information on this subject. You would know that this not true for today's battery technology.
    This is nothing but a myth.
    You will have a better chance looking for Bigfoot.

    Why waste 40% of your battery use....
    4
    With credit to VR-25 from Github:

    If you edit these files and put you own values in then your phone will start charging when it drops below 75% and stop when it gets to 80%. (put your own values in, etc.)

    I have only tested it briefly but it seems to work for AC and USB charging for me so far. No other apps or tweaks needed.

    /sys/devices/platform/google,charger/charge_start_level:75
    /sys/devices/platform/google,charger/charge_stop_level:80
    4
    What would be the purpose for this.
    I always charged to a 100% and never had issues on my devices.
    If you do some reading you will see that charging over 80% and draining under 20% will significantly shorten the lifespan of your battery. This is important for those of us that have devices not sold in our country so getting replacement batteries would be very difficult and expensive. I have phones that are more than 9 years old and still going fine if charged like this.
    3
    ... and if you really want to knacker the battery, heat it up too!

    Worst case scenario - using a sat nav app on your phone in the car on a hot day with the phone plugged into a car adaptor. It's going to be sitting there at elevated temperatures, possibly with the sun shining on it, whilst being kept at 100% battery....

    I'm only a customer (and have no other affiliation) and like to tinker, so I got one of these for use in the car to limit temperature when charging and limit max charge. Not cheap, but ok compared with the cost of the phone https://chargie.org/