Battery charge/full charge/full charge design issue MBP 14.1

[aranega]

Hi,

I'm having trouble with the life of my battery in a strange way. I'm currently under kernel 5.15.4 in archlinux, but I had issues like this since few versions of the kernel.

The thing is that tlp-stat and upower report a full battery while echoing values from the device directly says something a little bit different. For example, I can have 99% battery reported, but in fact it's more close to 53% directly looking at infos in BAT0 directory.

Currently on my machine:

tlp-stat reports this: (notive the Charge and Capacity which are really not in sync, I don't know if they need to be, but it would be logical to me)

+++ Battery Care
Plugin: generic
Supported features: none available

+++ Battery Status: BAT0
/sys/class/power_supply/BAT0/manufacturer                   = SMP
/sys/class/power_supply/BAT0/model_name                     = bq20z451
/sys/class/power_supply/BAT0/cycle_count                    =    183
/sys/class/power_supply/BAT0/charge_full_design             =   4790 [mAh]
/sys/class/power_supply/BAT0/charge_full                    =   2550 [mAh]
/sys/class/power_supply/BAT0/charge_now                     =   2550 [mAh]
/sys/class/power_supply/BAT0/current_now                    =      0 [mA]
/sys/class/power_supply/BAT0/status                         = Full

/sys/class/power_supply/BAT0/charge_control_start_threshold = (not available) 
/sys/class/power_supply/BAT0/charge_control_end_threshold   = (not available) 

Charge                                                      =  100.0 [%]
Capacity                                                    =   53.2 [%]

upower report:

  native-path:          BAT0
  vendor:               SMP
  model:                bq20z451
  power supply:         yes
  updated:              jeu. 25 nov. 2021 08:30:29 (1 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               fully-charged
    warning-level:       none
    energy:              29,121 Wh
    energy-empty:        0 Wh
    energy-full:         29,121 Wh
    energy-full-design:  54,7018 Wh
    energy-rate:         3,11766 W
    voltage:             12,594 V
    percentage:          100%
    temperature:         29,3 degrees C
    capacity:            53,2359%
    technology:          lithium-ion
    icon-name:          'battery-full-charged-symbolic'
  History (charge):
    1637825424	100,000	fully-charged
  History (rate):
    1637825424	3,118	fully-charged

and the information from the BAT0 directory:

$ cat /sys/class/power_supply/BAT0/capacity
54

$ cat /sys/class/power_supply/BAT0/charge_full 
2550000

$ cat /sys/class/power_supply/BAT0/charge_full_design 
4790000

$ /sys/class/power_supply/BAT0/charge_now
2550000

I have the impression that the battery doesn't run at its full design capacity, but I don't know if that's normal. It is possible to force the charge_full and charge_full_design to be the same? Or it's not a good thing?

Thanks for your help!

EDIT> the laptop is 3 or 4 years old now, it ran a lot on power supply. Could it be that my battery is just dying? But almost 50% in 3 or 4 years sounds like a lot.

EDIT2> The charge_full also fluctuate from one boot to the other. Now it's 2587000

EDIT3> If I unload reload the sbs module, then the charge_full passes from 2450000 to 2490000. It loooks really weird that the battery deteriorate that quickly. Is it?

[sainathmurali]

Hi! I have the same model. I'm using ubuntu 22.04 by erasing macosX completely as I have a black screen issue in macosX, but I couldn't get the audio working. I tried the https://github.com/davidjo/snd_hda_macbookpro stuff yet no luck. Is it working in archlinux or is there a workaround to make it work?

[WOLFRAZOR]

Your battery may need to be replaced (irregular charging and discharging can also lead to battery damage).If the battery still appears after replacement, it may be a system problem.Also try disabling Turbo Boost, as Apple's machine often triggers Turbo Boost on Linux.