issue: Charging threshold setting not found.

[eugenialoli]

Subject of the issue

I'm using a Macbook Air 2015, and it says that "Charging threshold setting not found". Going inside the folder BAT0 it has only these inside:
alarm current_avg manufacturer subsystem voltage_min_design
capacity current_now model_name technology voltage_now
charge_full cycle_count power temp wakeup42
charge_full_design device present type
charge_now hwmon2 status uevent

Any chance it has that feature, to charge it up to a point only but it's named differently?

Your system

Macbook Air 2015
Mint 22
6.8 kernel

Version

1.2 (Latest)

Steps to reproduce

No response

Expected behaviour

No response

Actual behaviour

No response

[tshakalekholoane]

It seems unlikely. Based on the contents of your BAT0 folder, those variables all have different purposes unrelated to setting the charging threshold.

[eugenialoli]

If I change the battery with a modern, third party one could there be a chance of working? I guess what I ask is, is the variables reported directly from the battery, or the BIOS?

[pepa65]

Interesting question! It would need to be an ASUS battery, but I think it's not the battery, it's the charger that is part of the board that has the capacity to expose this through the kernel module asus_nb_wmi. I think if you load it, you will likely get the report back that it cannot load the module, because there is "No such device".

By the way, so fun to see you here, I was an avid OSNews reader decades ago..!

[tshakalekholoane]

I don't think it's reported from the battery either. I estimate you'd need a device from a manufacturer with drivers in the kernel i.e., ASUS, Lenovo (ThinkPads), and Dell.

[SylChamber]

I suggest having a look at the extensive documentation for the Battery Health Charging extension for GNOME. They support and have a page for Intel Macs. Maybe that all that is required is installing the applesmc-next kernel module like they write. It mentions the same API endpoint as bat (/sys/class/power_supply/BAT0/charge_control_end_threshold).