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Why does my Mac shut down at 20 percent?
Charge your battery to full and keep the power cable plugged and keep using your MacBook. Then, after a few hours of using the MacBook, you can remove the charging cable and let the battery drain until it shuts down. This will prevent a shutdown of MacBook at 20% or higher once the battery recalibration is done.
How long should MacBook Pro battery last mid 2012?
In our video rundown test, the 13-inch Pro lasted six hours and 51 minutes in OS X, which is in line with Apple’s rated battery life of up to seven hours….Battery life.
| Laptop | Battery life |
|---|---|
| MacBook Pro with Retina display (mid-2012, 2.3GHz Core i7) | 9:22 |
| MacBook Pro with Retina display (mid-2012, 2.6GHz Core i7) | 7:49 |
Why does my Mac keep shutting down even though it’s charged?
A depleted battery could be the cause of your Mac randomly shutting down. It’s pretty simple to check your battery status, and if you’ve reached your maximum cycle count, well, it’s time for a new one. Check your battery: Under Battery Information, you’ll find your current cycle count.
What battery does a mid 2012 MacBook Pro use?
New Laptop Replacement Battery for A1278 A1322 [MacBook Pro 13 inch] – (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012), fit MB990LL/A MC724LL/A – [Li-Polymer 6-Cell 66.6Wh 11.1V]
Why did my MacBook shut down randomly?
In any case, Apple’s advice on how to fix it is as follows: Get your MacBook Pro’s battery to less than 90 percent, connect it to the power adapter, quit all apps, close the lid (which should put the laptop in sleep mode), and let it charge for at least 8 hours. …
Why does my MacBook Air shut down when battery is 20%?
Recently I have noticed that sometimes my mac shuts down unexpectedly when the battery level is about 18-20%. It happens mostly right after I turn on the computer. The only way to turn it on again is to connect the mag safe and press the power button. Then i can disconnect the charger and all works normally with my 20% battery.
What to do when your MacBook Pro shuts down?
I’ve been able to reboot using my magsafe charger, and then unplug and run off battery power. However, this only works for about 10 minutes before the computer acts as if the battery is suddenly disconnected and shuts down again. Things I’ve already tried: Anyone have suggestions? Thanks in advance! Answered! View the answer I have this problem too
How long does battery last on MacBook Pro?
When the charge reaches 30% then it directly goes to 7% and few minutes later the MBP shutdown. I know that the battery is faulty, but i want to ask you: is this a kind of battery that get old first than a normal one? I mean, even if it drops from 30 to 7 %, now the battery lasts at least 5 hours.
Why does my computer shut down while the battery is still on?
Here’s a free one: CoconutBattery. As to why your system is shutting down while it has still lots of power is often a messed up SMC. What happens it the SMC holds a high and low watermark (the batteries charge) so it can go into power save mode so you don’t loose what you are working on.