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모델명 A1707. 2017년 6월 출시, 이 MacBook Pro는 Kaby Lake 프로세서 최대 2.8 GHz 쿼드코어 Intel Core i7 프로세서와 Turbo Boost 최대 3.8 GHz를 사용합니다.

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Replacement MacBook Pro Battery Dies at ~70% Battery

I have a 2017 Macbook Pro with the touchbar. My original battery wasn't keeping a charge and it was recommended to replace the battery. I replaced it with an IFixIt battery about 4 months ago. I followed the battery conditioning guide at the end of the instructions and the battery was performing wonderfully until recently.

I decided to finally do the OS Ventura update last week and after doing so the laptop would just shut off without warning with plenty of battery life remaining. Initially it was around 50-60% remaining and now it does it consistently at 70-71% battery remaining indicated in coconutBattery. When I plug the adapter back in, the battery has been fully draining and is charging from 0% indicated by Mac and CoconutBattery.

I've tried the SMC reset a few times without a difference.

It seems highly likely this is was software related issue from the immediate change in battery behavior after upgrading to Ventura after months of proper function, but I tried to remedy that by reformatting and downgrading to Mojave. However, the issue still persists on Mojave with the battery level at ~70% when the shutdown happens.

I cracked open the laptop to check if the battery connections were loose/broken or any abnormality with the battery, but everything looked fine to me. However, now even after a SMC reset coconut battery can't recognize the battery. Maybe the battery is recalibrating since I did disconnect and reconnect the ZIF cable

How likely is it that this is coincidental versus an actual battery issue? I couldn't find anything explaining this behavior anywhere. The closest I got was Ventura was causing excessive battery drainage, but nothing like what I'm experiencing.

Should I try getting a warranty replacement battery from ifixit or does anyone know if this is a software issue that has a fix?

Update (08/01/23)

Since last night the laptop doesn't even stay on without the charger plugged in. I've attached a screenshot from coconut. The battery indicator doesn't show on the toolbar anymore either.

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To me it sounds like your battery has failed. This happens occasionally as with every batch there are at least a couple bad ones. I've replaced quite a few batteries and have had the same problem where they're fine at first but begin to fail within weeks or months. I suggest you request a warranty replacement through iFixit. It won't hurt and it's really the only way to narrow down the issue (assuming you've already discarded your old one). It's likely a coincidence that it began having issues after Ventura. Best of luck!

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Let’s get a deeper view of things install this gem of an App! CoconutBattery so you can see what the batteries status more clearly. Post a snapshot of the apps main window here for us to see. Make sure the charger is plugged in.

The version of macOS doesn’t play a part in this issue. You could be facing a few issues besides the battery it’s self. Once we see where things are we can narrow down the needed fix.

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@jmoges- Well not good😞 the batteries micro-controller died! You’ll need to contact the iFixit Store for a replacement. Put into your note a link to this question so they can see what you’ve discovered.

Sorry, COVID has messed up a lot of things and this is one of them.

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