How to fix Macbook Pro Retina 13″ , 15″ shutting down at battery 30% or 40% left

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Did you replace your old macbook battery with a new one and now your macbook suddenly shuts down at 30% of battery power or at 40% or 45% of battery still remaining. You are not alone. This is mostly an issue with the SMC or the battery.

What is an SMC ?

SMC is what remembers your battery full charge capacity and also its lowest capacity so it can go to sleep or shutdown the computer before the battery fully dies.

So when you replace a new battery the full charge capacity will be lot higher than your old battery so the charge level of your new battery will not be accurate.

How to do an SMC reset on your macbook to fix battery shutdown problem

Let’s go through the process step by step.

Step 1: First save all your work and close all applications and Shutdown your macbook pro

Step 2: Then Remove the charging cable

Step 3: Now before turning on the mac ,Press The Shift + Control + option (alt) key and also the power button at the same time

Step 4: Hold those button together for at least 10 seconds

Step 5 : After 10 seconds release all the buttons at the same time

Step 6: Now start your macbook by pressing on the power button.

Step 7: Now the SMC will be successfully reset

Re-calibrate Macbook Battery to fix Macbook Shutdown issue :

Now you have to re-calibrate your macbook battery . To do that simply follow the below steps

Step 1: Connect the charger and fully charge your macbook to 100%

Step 2: After that leave the battery at full charge and leave your macbook connected to your charger for another 4 hours.

Step 3: Disconnect the macbook charger and use your laptop to completely drain the battery. You macbook will either shutdown again at 30% or 40% or it will shutdown on way lower percentange than before at 20%

Step 4: Don’t give up now. This is the important step. You have to again connect the charger and charge your macbook to 100% until there is green light on your charger.

Step 5: Now disconnect your charger and use your macbook until it runs out of battery and shuts down or goes to sleep.

Step 6: Now mostly your battery will be calibrated to shutdown or sleep at lower battery percentage of 1% or 5%.

Hope your battery issue is now fixed and you are able to use your macbook till the least amount of battery is left. Do share our article with others with similar issue.

Also comment below if you have any other macbook battery issues.

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