Wrong battery value on MacOS

Question

Wrong battery value on MacOS

b1nhack opened this issue a year ago · 10 comments

b1nhack commented a year ago

The macchina battery percentage value doesn't match the MacOS system's (about 3 less)

Answer 1 · 2024-01-13T19:56:20.000Z

It would help if you provided your macOS, macchina and libmacchina versions.

Answer 2 · 2024-01-14T07:31:51.000Z

MacOS Sonoma 14.2.1
macchina 6.1.8
libmacchina 6.3.5

Answer 3 · 2024-02-01T15:05:40.000Z

Can anyone with Apple hardware confirm this? If so, please let us know by contributing to the conversation.

Answer 4 · 2024-05-01T10:28:57.000Z

I see this issue with the battery too. Let me know if I can help debug the issue.

# native macOS tool
$ pmset -g batt
Now drawing from 'Battery Power'
 -InternalBattery-0 (id=33816675)	93%; discharging; 16:46 remaining present: true

# macchina
Battery     -  88% & Discharging

Answer 5 · 2024-05-04T13:39:13.000Z

Third-party battery replacements have caused issues, though way more sinister than this, in the past ¹. Are these miscalculations occuring on machines with an authentic battery?

https://github.com/Macchina-CLI/macchina/issues/73 ↩

Answer 6 · 2024-05-04T14:50:03.000Z

Yes! My machine is brand new, from the Apple store.

Answer 7 · 2024-05-04T15:08:02.000Z

My MacBook also has the factory installed battery. Utils like pmset -g batt seem accurate while the calculation with macchina seem off.

Answer 8 · 2024-05-04T20:54:36.000Z

I'll defer this to @123marvin123 as he knows more about the macOS side of things than I do.

Answer 9 · 2024-05-04T21:52:37.000Z

I'm not sure what could be the reason for these larger differences between the "pmset -g batt" command and macchinas readout. For macchina, the values are coming directly from IOKit. Only minor floating point -> int conversion are expected.

This is what I get on my MacBook Air M1 with original battery:

pmset -g batt
Now drawing from 'Battery Power'
 -InternalBattery-0 (id=22282339)	71%; discharging; 4:17 remaining present: true

Battery     -  70% & Discharging

Answer 10 · 2024-09-15T19:15:53.000Z

Not sure what is the difference between the properties of IOPMPowerSource but it seems that CurrentCapacity is the same as one displayed in Menu bar while StateOfChange used in libmacchina 0 represents something slightly different.

At least that seems to be the case when I checked I/O Kit registry, in terminal, on my machine (mbp13 M1):

ioreg -w 0 -irc IOPMPowerSource

I'm including values that seems relevant to me.

While on 100% battery:

  <class IORegistryEntry:IOService:IOPMPowerSource:AppleSmartBattery ...>
  {
    ...
    "CurrentCapacity" = 100
    ...
    "BatteryData" = { 
       ...
       "StateOfCharge"=99
       ...
    }
    ...
  }

And for example on 71%, CurrentCapacity is 71 while StateOfCharge in BatteryData is 68.

(But they can show same value sometimes)

Footnotes