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title: OS X Battery Percentage Command Line |
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author: Brett Langdon |
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date: 2012-03-18 |
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template: article.jade |
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--- |
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Quick and easy utility to get OS X battery usage from the command line. |
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--- |
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Recently I learned how to enable full screen console mode for OS X but the first |
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issue I ran into was trying to determine how far gone the battery in my laptop was. |
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Yes of course I could use the fancy little button on the side that lights up and |
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shows me but that would be way too easy for a programmer, so of course instead I |
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wrote this scripts. The script will gather the battery current and max capacity |
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and simply divide them to give you a percentage of battery life left. |
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Just create this script, I named mine “battery”, make sure to enable execution |
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“chmod +x battery” and I moved mine into “/usr/sbin/”. Then to use simply run the |
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command “battery” and you’ll get an output similar to “3.900%” |
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(yes as of the writing of this my battery needs a charging). |
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```bash |
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#!/bin/bash |
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current=`ioreg -l | grep CurrentCapacity | awk ‘{print %5}’` |
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max=`ioreg -l | grep MaxCapacity| awk ‘{print %5}’` |
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echo `echo “scale=3;$current/$max*100″|bc -l`’%’ |
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``` |
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Enjoy! |
