optimized battery charging not working MacBook m2

Just my experience...I have my MacBook Air M1 on the charger 100% of the time. If the charge cable is unplugged, whatever internal timer is used with Optimized Battery Charging seems to get reset after ~2 weeks. While connected to the charger, after the 2 week period the MacBook will slowly discharge itself to 80% and stay there and maintain the 80%. As mentioned, the moment the charger is unplugged, then plugged back in, the MacBook again will charge to 100% and stay at 100% for the ~2 weeks.

Gilles wrote:

Hi are you sure ?

When I got my Macbook pro M1, it stayed at 80% after around 1 week.

It worked very well during several months

But 2 weeks ago, it stopped. Alway at 100% now...

Did you unplug the MacBook at all or was AC power cut off to the charger (even for just a moment)? This seems to reset whatever timer Apple uses for this...and the time frame of which I am totally unsure of (2 weeks after unplugging the MacBook, then plugging it back in is a guesstimate) . I mentioned this in my previous post.

Gilles wrote:

Yes I did unplug from the Macbook (I mean the magsafe). Do you mean I should try to unplug the AC adapter from the wall ?

No. Please re-read my first post in this topic.

If you unplug the charger from the AC outlet or the USB-C charging cable from the MacBook, some sort of timer gets reset. When this timer is reset, the MacBook will charge to 100%. After the ~2-week reset period with the MacBook always connected to the charger, the MacBook will then slowly discharge to 80% and stay there until the charger is again unplugged from the AC outlet or the USB-C charging cable is unplugged from the MacBook. This resets the timer where you will again have to wait the ~2 week reset period.

Gilles wrote:

looks like working now ! So after one week only after unplug / replug.

Thanks for your help 👍

Good to hear that it's working again for you. The ~2 week time frame was an estimate & is the amount of time that I personally remember passing. I see it only took ~1 week in your case.

It's learned your charging habits and is now fully charging your battery.

Hi are you sure ?

When I got my Macbook pro M1, it stayed at 80% after around 1 week.

It worked very well during several months

But 2 weeks ago, it stopped. Alway at 100% now...

Yes I did unplug from the Macbook (I mean the magsafe). Do you mean I should try to unplug the AC adapter from the wall ?

Thanks. Ok, clear.

I'll try this.

Best,

G

looks like working now ! So after one week only after unplug / replug.

Thanks for your help 👍

Yes. Weird anyway. Sometimes it works, sometimes not.

mine has never worked. I have the m2 as well. open a ticket with support and they barely understood how and why it should work. my MacBook Pro works absolutely fine.