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2.2 GHz (Turbo Boost使用時最大3.4 GHz), 2.5 GHz (Turbo Boost使用時最大3.7 GHz)もしくは2.8 GHz (Turbo Boost使用時最大4.0 GHz) L3キャッシュで6 MBのクアッドコアIntel Core i7プロセッサ

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My replacement battery constantly reads at 7% after ~60% remaining

So I replaced my battery with iFixit’s battery in my 2015 15” MacBook Pro. The new battery seemingly had an issue where once the battery would reach about 60%, it would jump to 7%. But the thing is that the battery would last a normal amount of time for a full charge, regardless of the percent. So it would claim that the battery was at 7%, but in reality, it had plenty of battery left and was just reading the charge wrong.

So I emailed iFixit and got a replacement battery, but THIS one has the exact same issue. So either I’m the most unlucky person in the world and got two bad batteries back to back, or something is wrong with my laptop.

I reset the SMC and did one of those “full drain” things to “calibrate” the battery, even though I think battery calibration is bs. I can’t find anyone else having this issue. Any ideas?

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I'm having the same issue. I've tried numerous times over the past two months to calibrate the battery, but the same thing happens. It jumps down to 7% like clockwork after running for a short amount of time.

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You’re not the only one who posted on this forum having had exactly the same issue with exactly the same numbers too. Probably a faulty component in battery logic and by the time manufacturer realized about it batteries were already in the market. Requesting a new battery replacement seems the best option here.

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do you know if the new batteries now are ok? Because I've tried 3 different batteries, all having the same problem. Now I'm wondering wether is it better to just ask for the refund and try another supplier or to give them another shot

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Is the solution just to keep replacing it till you get a good battery? I guess if returns/ refunds are easy to claim it's not too bad but would be much better to get a reliable source

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Christopher Mueller さん、ありがとうございました！
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