Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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Battery Failure with new battery MacBook Pro 2011

Hi! I just changed the battery and installed CoconutBattery.

I was in the middle of calibrating (at least, I think it was calibrating: it was the process of fully charging, then let it fully discharge, and charge it again). As soon as I unplugged the power, the charge jumped from 100% to 80% and Coconut shows Battery failure.

Did I got a faulty battery? Or is there something I could do like resetting SMC?

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(I apologize for my bad English: it's not my native language and I guess I made a lot of awful mistakes :))

Answer this question I have this problem too

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And now it automatically powered on as soon as I plugged in the power. it is not normal, I guess?

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What was happening with the old battery? Would you now run Coconut with the mag-safe plugging in and post a photo of that.

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Unfortunately coconutbattery trial expired so I cannot see the advanced info anymore. The free version only shows me this

https://i.imgur.com/fRHL0fA.png

and this is the info in About this Mac (I don't know if it may be useful)

https://i.imgur.com/iqpWHgO.png

Btw I was using the Mac and it powered off at about 60% charge. Afterwards I tried to power it on but I couldn't get it past the apple logo. Is this normal? With my old battery, once it shut off because of the charge I couldn't even get it to seem to start.

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your latest update is when using the old battery or the new one?

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When using the old one

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1 Answer

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Once in a while I get this issue with new batteries. Try at least 5 cycles of full charge and discharge and see whether the issue will go away.

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Thank you. I was beginning to think it would be better to put in the old battery, but I'll try to wait.

Also, it takes a lot to fully charged, compared to the old one.

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ghilo89 will be eternally grateful.
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