![]() Here we can see that the battery is in need of service. ![]() You can limit it to just the battery info by tweaking the command as follows: $ system_profiler SPPowerDataType | grep -i "charge information" -A 10 The output can be rather lengthy the info you need will be at the top. That will give you all the power settings related to your Mac. Using Terminal, just issue the command: $ system_profiler SPPowerDataType These are all good, but in my opinion, I would much rather use built in tools to get this info. There are a number of utilities that you can get (paid and free) that will look at your battery status: If it's necessary to have the power adapter plugged in when trying to turn it on, it's a sure sign that the battery is discharged. The computer (in this case your MacBook Air) turns off because there is no more/not enough charge in the battery.
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