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Battery percentage suddenly drops from ~60% to 7%

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A few weeks ago, I decided to replace my macbook’s battery - after 5ish years, the only thing about this laptop (the best laptop ever made) was the battery life drained quickly. I ordered a battery + kit from iFixit, and replaced the battery. I conditioned the battery, but every time it discharged it would jump from above 50% battery to 7% battery, then die shortly after (i.e. a very discontinuous discharge). I received a replacement battery for the replace from iFixit, and replaced again. However, I’m still having the same problem with the battery jumps . I figure it’s unlikely to be the battery, but am unsure what else could could be causing the issue. I’ve reset PRAM and SMC.

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Download Coconut Battery on your Mac and add some screenshots to your question, thus we may be able to see some additional technical figures. However that seems to me another faulty battery, there seem to be quite a bit in the market with such percentage jumps issue and hibernation not working at all.

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Added a screenshot of activity monitor and coconut battery

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@tumblingpenguin As I feared, another faulty battery, capacity is not coherent with 3 charging cycles and behaviour confirms its bad performance. Just ask for a replacement.

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So, it sucks to say this on the iFixit forum but… I got a battery off Amazon and it seems to be working fine. Got 3 hrs of editing on it and it went just fine. No sudden drops etc. Havent tested internet browsing etc but all seems regular. Will report back in a bit with more testing. All in all I can say that it was not a motherboard issue, it wasn’t related to any repair mishaps or else. Simply a bad battery (well.. two fo them).

Now, I don’t think it is an iFixit issue and their customer service is stellar. I think that given the age of the machine, some of the batteries may be “dated”. Maybe the Late 2013 machine is just old and the batteries that are around now were meant to be purchased long ago… don’t know.

But again, the new battery works fine. I won’t post the link out of respect for ifixit but a quick search on amazon (i got mine from amazon italy) will show a range of batteries around 50 Euros. I got the one with the best reviews…

good luck everybody. BTW the Late 2013 MBP is still a solid machine, I have done all kinds of video editing and color etc and i works great. yes, slower than my new top specs MBP 2019 but hey…6 years old and still competing…

Long live the Late 2013 mbp (with a new battery)

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Could you recommend please the vendor of the amazon battery? Because I'm in the same boat and iFixit is not able to offer me another replacement (I already used 3 of their batteries in a month and a half, all of them with the same problem).

Amazing customer service, but sadly these batteries (as I understood it's a common problem during these months) are not so well functioning.

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I am in the same situation with a MacBook Pro (Retina, 15-inch, Mid 2015). Im on my 4th battery and they have all had the same exact issue. Like everyone here has mentioned iFixit’s customer service has been great the whole way. Sadly looks like I’ll have to return this last battery and hope I can get one that works from another vendor.

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Just an update. I bought another battery from another source and swapped the 4th iFixit battery out for the new one. New battery works as expected! 5th battery is a charm! iFixit customer service was great during the entire process but they are certainly shipping dud batteries. I would suggest anyone with this issue should buy from another vendor.

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I thought I was imagining what I was seeing as mine does exactly this.

Looks like I need to RMA it.

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Eric, would you mind me asking which vendor you purchased the working battery from? I'm having the same issue with my iFixit batteries, and I'd really love to get one that works ASAP, as pulling it apart and having duds is not very pleasant.

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@mp_fix I got the battery from macsales (OWC). Works like a charm after ~3 weeks of use.

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Just wanted to follow up and let others know that I also replaced this battery with an OWC battery, and it is working well, no issues since I replaced the battery over a week ago.

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Replaced mine 2 weeks ago, same exact issue.

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I am on my 3rd battery as well from Ifixit. I’m almost to the point of just sending this to apple to get it fixed. :|

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I installed battery #2 without using the adhesive as I wasn't very hopeful it'd work in my machine. It also erroneously reports charge state. time to cut my losses and get a refund I think.

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I ended up with a newertech battery from OWC, and it's now working perfectly fine.

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I’d be interested to know how many people are returning these, and if anyone has gotten one that works. Based on the comments here, it seems like all of the batteries iFixit is shipping recently are bad. Would be nice to know if this is the case, as it would save a lot of people a lot of time replacing faulty batteries with more faulty batteries..

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I don't think this is specific to 'iFixit' batteries, I've tried 5 different batteries from 4 different suppliers now (not iFixit), and had similar problems on all but the last one. I think there's just been a lot of really poor quality batteries coming out of China since late 2018, and those that are problematic are only starting to show up recently. Unfortunately we're all still at the mercy of the Chinese (and Apple of course, but that's another story).

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Wish I'd seen all these comments before I ordered from iFixit and went through a super complicated battery replacement process (Macbook Pro Retina 2015 requires removing almost all the internals to change the battery). Mine new battery from iFixit is defective in just the same way that everyone else is reporting here. Maybe time for some sort of class action lawsuit against iFixit?

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the censers that control the % of battery may be shot or they may not be wired up correctly

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Hello, Jacob, did you find out about the problem? I have exactly the same issue now. Brand new battery (second already) and battery level drops from around 60% to 7%, remaining for quite some tome on the 7% level after that.

Cheers, cal

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I am having the same exact issue… I requested a replacement of the battery, which arrived today. I installed it and… same issue again. Unsure if it has to do with the compatibility or what. The last battery was also loosing it’s capacity very quickly, so we’ll see what this one does.

Not entirely sure how to solve the issue, and if the laptop requires the full disassemble in order to change the battery (i admit i only replaced the battery without disassembling other parts).

fingers crossed but hope is low.

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i got another battery from them and the issue is still there. Not sure what the issue can be but aside from “a faulty battery”, being the second one from iFixit that I install, i wonder if this is just the nature of it. any idea?

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I have the exact same issue on my Macbook Pro Late 2013, and this is the second battery I’ve received from iFixit. What I’ve notice isn’t just the sudden drop in charge from about 50% to 7% but also the reverse when charging, as it will jump from about 65% to 100%.

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Do you still have the same issue? I just replaced my battery and I'm having the same problem.

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I have exactly the same issue. I tried fully draining it and recharging a couple of times, but nothing helps. CoconutBattery says the battery is in fine state, but decharging abruptly goes from ~90% to 7% and shutdown within an hour. Recharging suddenly jumps from ~40% to 100% after an hour or two.

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Mine was broken. I had to replace it with one that works.

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Same problem for me. Replaced battery in my Macbook Pro Retina 2015 with an iFixit battery.

Followed all the steps they recommend including resetting the SMC card.

Charge drops abruptly from 90% to 6%.

Went through whole recalibrate procedure several times. Never any difference.

And huge hassle to swap out the battery on this machine, having to remove the whole logic board to do it.

Can’t believe iFixit is shipping defective product after defective product. Wow!

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Tbh, I don't think you need to remove the whole logic board to replace the battery. I only unplugged a couple of connectors and used dental floss to disattach the old battery. Google it.

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jacob sager さん、ありがとうございました!
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