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2020年11月発売。MacBook Pro 13インチモデルは、8コアのCPUと8コアのGPUを搭載したAppleのArmベースのM1 SoC。(モデルA2338 / EMC 3578、Thunderbolt 3ポート2基搭載)

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46% battery in my M1 with light use, what went wrong?

Hi everyone,

I’m hoping to get some perspective on what might have caused my battery to degrade this much.

Model: MacBook Pro 13" M1 (2020)

I bought it on the second day after launch and maxed it out.

Mostly web design work, around 5 hours on weekdays. I’m usually in Safari/Chrome/Edge, some Photoshop, and After Effects only once every few months. It’s never really overheated, and in real life the battery still lasts over a day, which is why the “maintenance” warning caught me off guard.

Battery health:

  • macOS says 62%
  • CoconutBattery says 46%

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I stayed on Sequoia 15.6 for about a year, then updated about 4 months ago to 15.7.2 (24G325).

  • Usually kept it between 20–80%
  • Never left it charging overnight
  • Plug it in when doing heavier tasks
  • I Always used it indoors, never really traveled with it
  • Surge protector
  • 25°C and 40°C all year but I only use it inside, AC on

I honestly planned to use this machine for 10 years. Performance-wise it still feels basically new, so I’m confused about what I did “wrong” with the battery—especially since my iPhone and iPad from around the same time are still sitting around 80%.

I’m already planning to bite the bullet and pay for an official battery replacement, but I wanted to ask here first:

Does this kind of degradation seem normal for an M1 Mac after this many years?Could heat or being charged in a lot of times (+500s) have sped things up?I

Thanks for any thoughts or experiences.

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Sadly, cycle count is not the only way to measure batteries life. Age and over tethering to AC outlets. Here the battery is 5 years old, if you tend to leave the system plugged in (on or off) most of the time then the battery doesn't get a chance to discharge (which from your description is not an issue). It's also been found not exceeding 80% charge offers better life. Review your battery's setting to see if you can set it or download the App which can override the OS. Lastly, you could have just gotten a weak battery🙁.

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MacBook Pro 13" (A2159, A2289, A2338) Battery

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Thank you so much!

Yes mine does have the 80% setting and I have an Automation notification set up too, my 2020 ipad is still going strong using the same kind of care/surge protector. Thank you for the guide

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@beaglecoconut I have seen batteries die on MUCH lower cycles, 5 years is a long time for any re-chargeable battery, 80% charging or full charging makes for no real difference, just how it is.

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Hi,

Apple says the a battery can last up to 500-1000 cycles and most MacBooks go beyond the 1000 cycle mark and still having a decent amount of health in the battery.

But

There are some exceptions an some batteries fail before the 500 cycle mark without a clear explanation.

You are better if you replace your battery to avoid complications like swollen battery or further degradation , when your battery does not hold any charge and the Mac turns off when unplugged.

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Thank you, yes I plan do get a new one as soon as possible. My mac still lasts about 1 full day of work but I dont want to risk it. Bad luck then, 562 cycles :/

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Coconut さん、ありがとうございました！
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