Display percent battery remaining
Bash, 70 67 50 46 43 16 bytes

`&lt;/*/*/*/B*/c*y`


Outputs: &lt;battery 0-100&gt;: command not found

Reads the file /sys/class/power_supply/BAT1/capacity.

Tested using Ubuntu 18.04 on a LENOVO ideapad 500.

Takes a while (since it searches the entire filesystem) - but it saves a byte!

Old answer:

echo Remaining battery is `&lt;/*/*/*/B*/c*y`%