11

I have an Apple Wireless Keyboard and a Magic Trackpad, and I was wondering if there is a way to monitor the battery life remaining/percentage like there is in OSX.

13

There isn't a GUI for read wireless mouse or keyboard battery data.

You can find useful information on sysfs under /sys/class/power_supply/. For example the Apple Wireless Keyboard is under /sys/class/power_supply/hid-78:CA:39:4E:6F:C7-battery/. In the device directory there is a file named capacity, this is a capacity in percents.

So in summary, for reading Apple Wireless Keyboard battery capacity you should do:

cat /sys/class/power_supply/hid-78:CA:39:4E:6F:C7-battery/capacity

Note that hid-78:CA:39:4E:6F:C7-battery can be different for your device.

  • Huh, this is a really cool directory I never knew about! Thanks! – Ben Kushigian Feb 11 '18 at 18:09
  • My device does not show in power_supply/ what to do? – Ankur Loriya Jul 24 '18 at 14:29
7

In newer Ubuntu (starting from 16.04, I guess), check under Settings -> Power

Here's a screenshot for Ubuntu 16.04 .

  • Could you be specific about the first version you saw this on? – Mark Stosberg Oct 10 '18 at 18:56
  • @MarkStosberg updated answer – Yuri Baburov Oct 11 '18 at 19:50
2

According to this article on webupd8, this functionality is planned for Ubuntu 11.10 as part of Ubuntu's new Power Indicator.

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