::::: 해커즈뉴스 / 해커몰 :::::

1	`sudo` `upower -e`

위와 같이 입력하면 아래와 같이 나오는데

/org/freedesktop/UPower/devices/line_power_AC
/org/freedesktop/UPower/devices/battery_BAT0
/org/freedesktop/UPower/devices/DisplayDevice

디스플레이 디바이스는 왜 나오는지는 잘 모르겠음.

전원 어댑터말고 배터리가 보고 싶으니

1	`sudo` `upower -i` `/org/freedesktop/UPower/devices/battery_BAT0`

로 입력하면

sudo upower -i /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               Notebook
  model:                BAT
  serial:               0001
  power supply:         yes
  updated:              Thu 25 Jan 2018 10:22:45 PM KST (116 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               discharging
    warning-level:       none
    energy:              18.7257 Wh
    energy-empty:        0 Wh
    energy-full:         28.0275 Wh
    energy-full-design:  31.08 Wh
    energy-rate:         3.1968 W
    voltage:             11.583 V
    time to empty:       5.9 hours
    percentage:          66%
    capacity:            90.1786%
    technology:          lithium-ion
    icon-name:          'battery-full-symbolic'