My UleFone Armor 2 has a 4700mAh battery and I would like to limit the charging to 60% to reduce battery aging. The batteries in most of the phones are not user-replaceable and I am worried that a factory/service battery replacement might affect water resistance negatively.
How can I limit the charging to 60%? (But not limiting charging speed. I love fast charging.)
Lenovo ThinkPads have a built-in feature that does this, called “battery preservation mode”.
There now is a hardware+app solution for that, it's called Chargie. https://chargie.org
Basically, Chargie is a Bluetooth switch that is linked to an app on your phone. You set the desired level of charging, the app runs in the background and stops the charge at the percentage you set.
*disclosure: I am the CEO of Lighty Electronics, we have developed this solution and this isn't meant to be a spammy post with a link, but rather a very relevant solution to this issue. As far as I know, there are no other manufacturers of such devices.
Many ways - all of course, need root. Without root, it's not possible and you can only be notified either by automation or using an app as suggested in Chang's answer
Battery Charge Limit from Play Store. If it doesn't work directly, look for help in the XDA app thread. It doesn't trip safety net if you are using Magisk. I use this app currently (Bonus, it's open source and on f-droid) Edit: Not under active development and would not work with recent Android versions
Magisk Charging Switch Magisk module is also well spoken of.
My Charging Controller is another option. I recall seeing it as Magisk module but not listed now
Above modules not tried by me
Edit: Advanced Charging Control (acc) Magisk Module is a very versatile module with an associated front end app, which allows you to create profiles and even run profiles on schedule. For more details, see answer here
It allows the phone to charge up to a certain point and then be powered by USB only. For example, you set the cut off at 80%,beyond 80% it doesn't charge the battery but draws a low current to keep the phone running. So when you disconnect charging, your phone is still at 80%! This feature requires to be supported by kernel though. I am using this currently on my One Plus 7 with Kirisakura kernel. For details see this Don't charge the battery but use connected power to run the phone
AccuBattery can notify you when the battery charge reaches a certain level. It won't stop the charging, unfortunately, but it's still worth a try. :)
My solution is to just use a CountDowntimer on the power outlet, set at 1:20 for me. One hit on the CD button to start the power (ON), and after 1:20 it's OFF again which will be at about 80% charge.
I use this: https://www.clasohlson.com/se/Digitalt-kopplingsur/32-8618
Today you can buy a smart power outlet controlled with an app. It shouldn't be long until that app can turn of the power outlet charging the cellphone when it reaches 60%.
If your phone is rooted, do prefer an opensource Advanced Charging Controller module to flash either from Magisk or Twrp or any root solution u have choose. Here is the Github link for all details.
My experience in this module is, I am using this on my Oneplus 5 for about a year now, it doesn't disappoint me. It creates a charging loop. You can change it's default preference by typing acc commands. 80% is the default stopping point. And there is heating machining where its charge/discharge on & off if ur phone is expected to reach a peak point, which is a nice way to tackle the heating issue which is generally seen while charging.
If any problem occurs u can ask him on telegram or create an issue on Github.
