How can I re-calibrate MacBook Pro 14" M4 (macOS 15.2) battery

THE EXPERT!

What are you talking about?

I'm telling you that I use my MacBook without a network connection, it runs on battery power.

There was no problem for 2 months, now it suddenly started shutting down without any notifications (going into hibernation).

I explained to you how I use it, if a problem appears, I probably need to solve it, no?

You don't need to teach me how to charge and discharge a MacBook, BECAUSE everything was fine for 2 months.

Moreover, why does my MacBook SUDDENLY turn off by 19-20-28%, and some Windows laptop works the same way after 4 years of similar conditions?

Honestly, it's very funny.

The expert.........

Ahahahah, that's exactly what I want to see on the forum with a solution to the $2000 laptop problem.

Very funny, you made my day.

It's the same thing if I told you: my pants are falling off, and you would advise me to close my eyes to it and not pay attention.

Super obvious, it shouldn't work that way, especially on a laptop for $2000

Hello expert again....

I don't have 1000 cycles, and the laptop is fresh, it was bought in November

Thanks for the physics lesson...

I found one of the possible solutions, and I will definitely unsubscribe if it works.

No, and that's not keeping the MacBook on charge at all times, or what you wrote.

I don't understand what the 80% that you wrote has to do with it, and so on

Missed again

Goodbye

loadaverage wrote:

>How do you know?

Because I know how much time I have on 100% of charge, then how much I still have on 50%, etc.

When I have 4 hours of browsing on 100% charge I can estimate that I will have about 40-60 minutes on 25% of charge. And I never had 0 minutes on 25% like on m4 now.

On 5% of charge I have around 5-10 minutes before laptop will go into hibernation. And that was true for years, so the battery indeed had degradation, but the battery controller was smart enough to recalibrate and display an accurate charge level despite the degradation.

You're assuming a linear decline. That's rarely the reality.

the system estimate of battery fullness has always been VERY coarse.

It's a little like having a gas gauge in a car with only one or two marks on the entire scale from full to empty.

loadaverage wrote:

But all laptops in my life (Sony, Asus, etc) were precise with battery data, e.g. when I saw 30% it was really 30% of charge left,

How do you know?

I agree, I usually charge when I see 19%

But a couple of times, I was "working hard", and I didn't notice how the charge level dropped to 1-5%, and everything was fine, it didn't turn off.

<< What do you mean by "always"? >>

"In general, you should ALWAYS connect a power source when it is possible to do so, and only run on batteries (which could be somewhat slower) when no power sources are at hand. Your Mac maintains its battery charge levels under program control, and will NEVER over-charge. "

So when you arrive at a new location, you look around and find a power outlet. You sit closer to it. You plug in your power adapter.

When you put your computer down for the night, you make certain that the power adapter is connected.

If the cord is too short, Apple sells an AC 'extension cord' for your power adapter for about US$20.

Your battery will have a longer lifetime if you don't run it down so low.

loadaverage wrote:

Thanks for the information, but I don't see how this is connected to wrong estimated charge displayed on macOS?

The fullness ESTIMATE is sometimes made MUCH worse by tiny internal weaknesses in the individual cells that make up a Mac battery. Suppose one or more cells are getting weak. When the charge level of the group approaches some threshold, say, 20 percent, the total output of the battery could collapse suddenly if ALL the component cells can not carry their part of the load.

The Estimate will not change immediately. But your behavior must change, or it will catch you again and again and again.

if you keep your MacBook at a higher change levels in general, you will rarely care when it says the charge level is low, and exactly how low.