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Model A1297 Unibody: Early 2009, Mid 2009, Mid 2010, Early 2011 & Late 2011

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After battery replacement random shutdowns on battery power only

I ordered & installed a replacement battery for my mid-2010 17” MacBook Pro. I tried to calibrate it per the iFixit instructions, but when I was trying to run down the battery, the computer shut down for no reason at about 80% battery. After I plugged it into a power supply I was able to start it again and it still showed 80% battery and then I let it sit overnight to die for the battery calibration (I did not keep an eye on it so I don’t know at which point it crashed, and I let it charge in the morning for several hours before using it again).

In short, this has continued to happen intermittently when I am not plugged into a power supply. The computer will randomly shut down when there is plenty of battery power left and it still shows as having plenty of battery left after I reboot. I had no issues like this before replacing the batter — the old battery did not hold a charge for long but it also did not shut down randomly.

Things I have tried:

-Resetting SMC

-Resetting PRAM

-Running Apple Hardware Test (results normal)

In System Profiler the battery status shows as “Normal”.

Is there anything else I can do? Is my battery just a lemon? Can I get a refund? If I have to be plugged into power for the computer not to crash, I’m no better off than I was before. I am a musician and I use this laptop in live performance so I cannot have it randomly crashing.


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Kit per Apple Watch

Screen and battery repairs just got easier.

Acquista ora

Kit per Apple Watch

Screen and battery repairs just got easier.

Acquista ora

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Risposta Più Utile

It sounds like a simple faulty battery but if you download Coconut Battery and post a couple of screenshots with data measured with and without charger we might get a better picture of battery status. In any case iFixit has a very good aftersales service and you won’t have any trouble getting the battery replaced if faulty. You may start from here if you wish so:

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M.O. Abbot sarà eternamente grato.
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