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MacBook Pro battery problem?

I installed my ordered ifixit battery yesterday, but upon checking the health I came across the age of the battery which 10.2 years old with a manufacture date of 3 Jan 2011 using battery health 2 app which I don’t think reliable. I am following the instruction to calibrate, but while discharging from 100% to 0% the battery went from 40% to 7%. This has me worried. Ifixit have said to run the battery for 20 cycles to properly calibrate.

Update (03/03/2021)

its been a few weeks now. I was sent a replacement battery the old battery was at 67% health at the end with 55 cycles on it. I installed the replacement yesterday, I am sorry to the same thing is happening. The battery is calibrated. I am charging it to 100% then when discharging the power levels drop from over 50% to 7%. I think they need to change their supplier.

Update (03/03/2021)

the replacement battery is now has 5 cycles and the battery health is down 10%. I have followed the calibration instructions as before. I am using better battery 2 app to see the status of the battery and usage history details.

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It sounds weird that it says that the battery is so old.

I would recommend you to contact the iFixit support about that and they will help you, here is a link to the support contact information.

iFixit Support

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The battery info says 3rd January 2011 two times in a row the % dropped from 50% to 7% instantly. I have emailed Ifixit, still waiting for a reply. I have sent screenshot as well. Also the battery health has dropped to 96% in a day with the mAh dropping from 8600 to 8297 mAh.

さんによる

The health of the battery has now dropped to 93% and the max is now 8037 from original max of 8600. I have had no reply for ifixit to resolve this issue yet.

さんによる

@Harry G - did you contact iFixit Support?? I would do that ASAP !!

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@danj I did. It seems the 10.2 years old is a display error using another app the age comes from 21 dec 2020. But I still have a problem with it fully discharging in matter of 2.5 hours. The battery keeps on dropping from 50% to 7% just in a instant. Ifixit have said to run it for 20 cycles to properly calibrate and if I feel it not working still they will offer a replacement.

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@Harry G - Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see iFixitでの質問に画像を追加する方法

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looks like I have same problem with my MacBook Pro 15 mid2014. bought on eBay one month ago with 4 cycle count battery, now has 40 after one month usage and battery health dropped from 9000 mah to 8300. i’m using 100% original MagSafe 2 charger directly from apple.com so maybe seller sold me refurbished MacBook with bad battery quality. I’m losing 200mah every week with only browsing use ?

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Harry G さん、ありがとうございました!
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