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2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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MacBook shuts down randomly with still battery charge left

Lately my macbook randomly shuts down when working on it. I can work on it for about 2 hours, shut it down, but when I want to start it again later the same day, it will start and immediately after login turn back off. When I try restarting at that point the dead battery sign comes on. I know the battery is not dead, because when I plug the laptop back in, the battery is still at 40% or higher.

I don't know what I have to do, I need my macbook on the go. I'm a repairing guy, but I need tips on where to start looking.

Than again I started looking online, and found out that there is a graphics card return program. Could my macbook be considered under this program with the problems i'm having?

Update (10/09/2016)

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This is how it looks right now after my first discharge and charge

Update (10/10/2016)

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@danj I've done another discharge, and this is the result after.

Maybe i should indeed take the battery off and try that to give the reset.

What tutorial should i follow to do this?

Respondido! View the answer Também tenho esse problema

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Yes your machine may have this issue but it usually exhibits video or power up issues:

https://www.apple.com/support/macbookpro...

This can only be confirmed by taking it to an ASP or Apple store for the test.

por

I suspect you didn't get the system to reset the SMC. Try again.

The other option here is to open the system up so you can disconnect the battery. But you need to hold the button a good minute as well so the system circuits are discharged.

por

Ok, do I just follow the tutorial to disconnect the battery than? What button are you talking about?

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Follow this guide:Battery and Trackpad. Disassembling MacBook Pro 15" Retina 2012-2015. Go up to Step4, that should do it.

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First you should get an app that can help you see the battery condition. Here's a free one: CoconutBattery.

As to why your system is shutting down while it has still lots of power is often a messed up SMC. What happens it the SMC holds a high and low watermark (the batteries charge) so it can go into power save mode so you don't loose what you are working on. I would reset it following this Apple T/N: Reset the System Management Controller (SMC) on your Mac. Then after your system is fully charged let it fully discharge at least two times this will reset the low water mark to be at the correct level.

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The problem is though that every time I want to discharge it completely, it goes into power save mode to early and I need the power adapter to start it up again. Would this still be the watermark?

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As I said you need to do this at least twice and yes a discharged battery will act that way. You need to have Coconut running to see what it set to just after restarting with the MagSafe adapter reconnected. How about posting a screen shot of Coconut here so we can see whats up.

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I have followed these steps twice now and I think I've finally done it correctly. I was having the same issues but I don't think I was following the instructions carefully. Once I reset the smc I then reset the NVRAM or PRAM according to the link above and LET IT DRAIN TWICE. My Mac just died again for the second time at around 16%. So I plugged in the charger when I realized that my computer was on sleep and the battery percentage was at 0!

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So, i am facing a similar kind of problem. The MacBook just turns off at around 20% mark. when i try to switch it on, it shows low battery sign. However, when I plug in the power cord, it shows 20%+ battery. I have followed @Dan's method and that mark have dropped to 8%. Going to drain the battery second time now. Hopefully, it will correct the issue. Will post the result here. Thanks!

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This worked for me, my battery used to die at 30 percent, now it shuts off at around 1 percent. Thank you @danj .

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Hi Guys.

I had the same problem with my battery, showing 40% and shutting down. I did everything as suggested so, in the end I contacted Apple support as my MacBook Pro still had Apple cover. They did everything over the phone but could not solve the problem. So, they arrange an appointment at one of their stores. One of the Tech guys there did a system check and came back five minutes later and said it’s the battery even though all the checks showed the battery was ok. He showed me a graph on his test system, if your battery is ok it shows a white dot in a green box and it should move from top left to bottom right. But the white dot in my test , was showing it was moving vertically down in the green box. He said it shows the battery will fail, and that’s why you are getting the problems. If the dot is in the green box the system will always say the battery is ok but it’s not. They changed the battery and have had no problems since.

Michael

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Michael, I have this same issue with same feedback from Apple. Odd thing is Hibernate off and still randomly shuts down. Plug in tap the power button and remove the power cable (so back on battery) and it restarts out of Hibernate ok.

Appreciate you have resolved your particular situation with a replaced battery (might end up the samr), however, for others some extra info.

My battery shows Normal with 820 cycles!, late 2013 MBP retina 15". Odd thing is a friend has an early 2012 with ony 500 cycles and reports battery needs a service!

My battery test came up with an error code (cant find it right now) that Apple says battery needs a service - and yet macOS does not reflect that...

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Dan, does it matter at what battery charge level you should do the SMC reset? That is, should it be done when the battery is low or when it's fully charged?

And the other question - should the magsafe be plugged into the computer while doing the SMC reset? The Apple support instructions do not specifically point out this detail.

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Sorry for not seeing this question sooner. Here's another guide: Calibrating Your MacBook, Air, or Pro Battery which outlines the steps a bit better.

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How do you check the low-water mark? Is it one of the measurements in coconutbattery?

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The value is held in the SMC and is dependent on the health of your battery. You have access to three areas the 'Design Capacity', 'Cycle Count' & 'Battery Status' within CoconutBattery which is what you have to work with

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Hi,

Here is the screen shot of my mac battery status after installing coconut. Please provide your suggestion and the steps to follow.

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You need a new battery!

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Hi

I am seeing this strange behaviour where my MacBook 2015 shuts off with 75% battery remaining. I have tried resetting the SMC three times but to no avail. I must admit I haven’t been able to drain down the battery as it shuts off after 75% and I can’t check the status without connecting to ac source again. The coconut battery status shows a discrepancy of nearly 5% between the OS status and the reading on the coconut app. Also it shows a design capacity of 44% does it mean the battery is in poor health?

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The design capacity is getting low - I would replace the battery soon.

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Hi,

Even I have the same issue with my Mac, experiencing sudden shut down. Then the apple service center asked for the battery replacement.

I bought a battery from Amazon and replaced it, but still with in 20 min it asked me to replace the battery again. Then I completely removed the OS and installed fresh, then the issue got rectified and never had an issue there after.

I didn’t put the old battery again because it is a very time taking and hectic process. If any one facing the similar issue please try to install the OS, if the issue is not resolved then only go for replacing the battery.

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Replacing your battery does not require you to re-install your OS!

It sounds like you have either a messed up OS as well as needing a new battery.

Old and misbehaving apps or Malware and Viruses would then be the likely things that need to be checked out.

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I have had my laptop Mac AIr 2013 repaired in Kathmandu, I reside in Nepal...

It used to shut me down when playing I-tunes, and then had to restart it and still had 65% of the battery going, so how cold it does that.

SO, in Kathmandu they said the battery was faulty, maybe it was not...I bought it only 2 years ago...now after the repair, last month, my 'new battery' made in Singapore, is continuing to shut me down.

Just now and with 75%. the technician said I can bring it to their store here, I wonder if he knows about what you are explaining here about it? Or have they simply not changed it with a new battery?

Anything in these banana republics can happen.

What should I do? I paid 40 dollars for the Battery!

What is this coconut battery?

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Ita an app you can use to visually see your battery health CoconutBattery

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