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发布于 2012 年 6 月, 型号 A1278. Intel 处理器,支持 Turbo Boost, 最多 512 MB DDR5 显存

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After replacing battery, laptop shuts down without warning

Hi, I recently replaced my mid 2012 13” MacBook Pro’s battery. The replacement went smoothly.

After doing so, my device will, without warning, shut down. This occurs both on battery power and while plugged in to the adapter. Sometimes, after I restart, the battery indicator says it was at the same power level as before. Other times, it will drop down to empty, even when it was previously reading ~30% or greater.

I have reset the SMC and zapped the PRAM. Attached is a screenshot of my coconutbattery results

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Update (11/26/2018)

As mentioned above, here is the coconut battery data from my old battery (after an hour or two of charge)

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Coconut Battery is showing that the battery is really trying to charge up. But it is still on recharge cycle #1. so it hasn’t even charged once. What was happening with the old battery? If possible I would put it back in, try to charge it for several hours and then post the Coconut battery results on that one.

UPDATE 11/27/18

Before returning the battery, put it in a calibrate it. Here’s how:

https://www.youtube.com/watch?v=T5ZMLInL...

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Thanks for your help and sorry for the delay in responding – thanksgiving has kept me from handling my tech issues :)

So here's the longer story. When I bought the computer in 2013, I replaced the superdrive with an extra HDD for storage. Both it and the solid state drive I use as my boot drive were getting up there in years, so I replaced them a few weeks ago. In so doing, I did a clean install, upgrading from Sierra to Mojave.

Upon installing Mojave, I noticed an immediate decrease in battery life to around 2 hours on a full charge (from around 5). I inspected the system profiler, did some research, and discovered that my battery had gone past the recommended cycle count and was due for an upgrade. I bought the ifixit battery kit and replaced it. As soon as I did this, the issues with instant shut downs began.

Per your suggestion, I reinstalled the old battery and charged it for a few hours. There have been no issues with unexpected shutdowns. I will post the coconut battery results below.

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You know the saying, "If it ain't broke, don't fix it". That old battery looks just fine. What I am worried about is the Mojave installation and how it was done as it can cause real problems with trying to impose APFS formatting on existing third party SSD and SSHD drives, when installed as an upgrade to an existing system.

完成的

The old battery is working okay in terms of no shut downs, but as I mentioned, the battery life has been cut down to <2 hours of regular use on a full charge, which is less than ideal.

The drive is a samsung 860 evo. I had been successfully running many other versions of osx off my old third party solid state hard drive. Here was my (probably unnecessarily complex) mojave installation process. But I had troubles with downloading the osx installer, and it was the way I got it to work.

I pulled the old HDD (used entirely for storage) and replaced with my new HDD. I created a small partition on that drive, and installed Mojave on it. Then I shut down, pulled the old SSD, and replaced it with the new SSD. I booted from the bootable partition on the HDD, used disc utility to format the SSD as MacOS extended (journaled), then installed Mojave on the SSD.

Thanks again!

完成的

Any thoughts on the installation? Do you think that's to blame for the battery decrease? Should I just return the battery as defective given the lack of shutdowns on the old battery?

完成的

see update to answer

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Remove the battery and try using it without the battery for a while. Your Mac will be very slow without the battery, don’t freak out if it’s acting slow. Tell us if the random shutdowns keep happening without the battery.

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Nicholas Hurwitz 将永远感激不已
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