Laptop battery

Query battery status with acpi:

$ acpi -b
Battery 0: Charging, 16%, 01:24:00 until charged

Query battery with upower:

upower -i /org/freedesktop/UPower/devices/battery_BAT0

Query battery with /sys/class/power_suppply:

ls -al /sys/class/power_supply/BAT0/*
cat /sys/class/power_supply/BAT0/capacity
...