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2011年初期のモデル。モデル番号はA1278 / 2.3 GHz i5 or 2.7 GHz i7 プロセッサー。

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Mac turns off with low battery

Hi guys. I bought a new battery spare on iFixit and I've install it on my mac. Everything is apparently ok.

But it happened to me that the battery level was around 14% and the mac turned off without any screen message. It did want to turn on until I connected the magsafe. Unplugging the magsafe caused another immediately shutdown.

So i left it plugged for some time and now it is properly working.

Suggestion about which is the problem affecting my new battery? Thanks

Update (09/09/2016)

Guys, thanks for replying me.

Well, I did the SMC reset procedure as reported by Apple (connecting the magsafe, i pressed control-alt-maiusc at the left of the keyboard and power at the same time). I was sure the procedure got successful because the magsafe led turned green and then orange again.

But apparently this not worked in my case.

So i decided to open again my laptop and I performed the procedure reported not for Macbook Pro, but for the MacBook, i.e. I removed the battery and pressed power button for >10s.

Now it properly works! This laptop will never die!!!

Thanks again

Update (09/22/2016)

Hey guys. I've got a new problem now.

After some days, I've got again the message "battery requires assistance".

What's wrong now?

This is the screen which reports the battery information: https://i.imgur.com/3MDbIGb.png

Some suggestion? Is the battery that iFixit sold me not good?

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You might want to consider resetting the SMC:

https://support.apple.com/en-us/HT201295

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What does the system information battery information say? You can run this directly under application/utilities folder. Look under power section. At the least, the battery health condition should be normal.

Other than that, do a SMC reset and charge the battery to 100% and let it drain couple of times and see if this problem goes away.

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Hello!

I have the same problem... SMC Reset done, but no change.

Battery removed, pressed Power Button, no change.

When it´s about 7-9%, the macbook turns off without warning.

Any more ideas what i can do?

It´s a new battery from ifixit (SMP).

Thank you!

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Hi Stefan, try also to run a calibration procedure. When the mac switches-off at 7/6%, try to plug the magsafe just to turn on the PC, then wait to reach 0% and the completely switch-off.

さんによる

Hi Mario,

i did not come to 0%. When i plug in the power cord the mac starts, but when i plug it off the mac is "alive" only for a few seconds... Did not come lower than 7-9%.

Tried again SMC-Reset, PRAM-Reset, Safe-Start... No Change! :/

さんによる

Any update on this please Stefan? Have the same problem. Bought a replacement battery from iFixit but the battery warning doesn't come on anymore :( the macbook pro retina just turns off at 10% charge. When I plug in the charger it turn itself on

さんによる

Hi Razvan,

i told my problem to iFixit, and got a new battery. This works, the other battery had a failure...

さんによる

I see. How do I know if my battery has a failure also? Is there any way to test it?

さんによる

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Mario Barbareschi さん、ありがとうございました！
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