A shell extension for powerline

First do this.

pip install osx-powerline-battery-segment

Then get your powerline ready to be customized.

This extension uses the highlight group osx_battery. That is, you'll have to define colors for it. I'm using this in my shell colorscheme json file.

"osx_battery": { "fg": "brightred", "bg": "gray0" }

You'll then want to add something like this to your segment configuration.

{
    "name": "osx_battery",
    "module": "osx_powerline_battery.segments"
},

This is what it looks like on my machine.

And here's the pypi link.