How To Check Laptop Battery Status And Level In Terminal In Linux
Finding your Laptop battery status in GUI mode is easy. You could easily tell the battery level by hovering the mouse pointer over the battery indicator icon in the task bar. But, how about from the command line? Not everyone know this. The other day a friend of mine asked how to check his Laptop battery level from Terminal in his Ubuntu desktop – hence this post. Here I have included four simple methods which will help you to check Laptop battery status and level in Terminal in any Linux distribution.
Check Laptop Battery Status And Level In Terminal In Linux
We can find the Laptop battery status from command line in three methods.
Method 1 – Using “Upower” command
The Upower command comes preinstalled with most Linux distributions. To display the battery status using Upower, open up the Terminal and run:
$ upower -i /org/freedesktop/UPower/devices/battery_BAT0
native-path: BAT0 vendor: Samsung SDI model: DELL 7XFJJA2 serial: 4448 power supply: yes updated: Mon 01 Oct 2018 02:08:14 PM IST (100 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: charging warning-level: none energy: 43.3011 Wh energy-empty: 0 Wh energy-full: 44.5443 Wh energy-full-design: 48.84 Wh energy-rate: 9.8679 W voltage: 12.548 V time to full: 7.6 minutes percentage: 97% capacity: 91.2045% technology: lithium-ion icon-name: 'battery-full-charging-symbolic' History (charge): 1526131128 97.000 charging History (rate): 1526131128 9.868 charging
As you see above, my battery is in charging mode now and the battery level is 97%.
If the above command doesn’t work for any reason, try the following command instead:
$ upower -i `upower -e | grep 'BAT'`
native-path: BAT0 vendor: Samsung SDI model: DELL 7XFJJA2 serial: 4448 power supply: yes updated: Mon 01 Oct 2018 02:08:14 PM IST (100 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: charging warning-level: none energy: 40.0932 Wh energy-empty: 0 Wh energy-full: 40.0932 Wh energy-full-design: 48.84 Wh energy-rate: 3.4188 W voltage: 12.571 V percentage: 100% capacity: 82.0909% technology: lithium-ion icon-name: 'battery-full-charging-symbolic' History (rate): 1538383094 3.419 charging
Upower not just display the battery status, but also the complete details of the installed battery such as model, vendor name, serial no, state, voltage etc.
However, you can only display the status of the battery by with combination of upower and grep commands as shown below.
$ upower -i $(upower -e | grep BAT) | grep --color=never -E "state|to\ full|to\ empty|percentage"
state: fully-charged percentage: 100%
As you see in the above output, my Laptop battery has been fully charged.
For more details, refer man pages.
$ man upower
Method 2 – Using “acpi” command
The acpi command shows battery status and other ACPI information in your Linux distribution.
You might need to install acpi command in some Linux distributions.
To install acpi on Debian, Ubuntu and its derivatives:
$ sudo apt-get install acpi
On RHEL, CentOS, Fedora:
$ sudo yum install acpi
$ sudo dnf install acpi
On Arch Linux and its derivatives:
$ sudo pacman -S acpi
Once acpi installed, run the following command:
$ acpi -V
Note: Here, “V” is capital letter.
Battery 0: Charging, 99%, 00:02:09 until charged Battery 0: design capacity 4400 mAh, last full capacity 4013 mAh = 91% Battery 1: Discharging, 0%, rate information unavailable Adapter 0: on-line Thermal 0: ok, 77.5 degrees C Thermal 0: trip point 0 switches to mode critical at temperature 84.0 degrees C Cooling 0: Processor 0 of 3 Cooling 1: Processor 0 of 3 Cooling 2: LCD 0 of 15 Cooling 3: Processor 0 of 3 Cooling 4: Processor 0 of 3 Cooling 5: intel_powerclamp no state information available Cooling 6: x86_pkg_temp no state information available
To check only the state of the charge of battery. To do so, run:
Battery 0: Charging, 99%, 00:01:41 until charged Battery 1: Discharging, 0%, rate information unavailable
Check the battery temperature:
$ acpi -t
Thermal 0: ok, 63.5 degrees C
We can view the above output in Fahrenheit using -f flag:
$ acpi -t -f
Thermal 0: ok, 144.5 degrees F
Want to know whether the AC power is connected or not? Simple! Simply run the following command:
$ acpi -a
Adapter 0: on-line
If the AC power is not available, you would the see the following instead:
Adapter 0: off-line
For more details, check the man pages.
$ man acpi
Method 3: Using “Batstat” Program
The batstat is a small ncurses-based CLI utility to display your Laptop battery status in Unix-like systems. It will display the following details:
- Current battery level
- Current Energy
- Full charge energy
- Time elapsed from the start of the program, without tracking the sleep time of the machine.
- Battery level history
Installing batstat is a piece of cake. Git clone the latest version using command:
$ git clone https://github.com/Juve45/batstat.git
The above command will pull the latest batstat version and save it’s contents in a folder named “batstat”.
CD to batstat/bin/ directory:
$ cd batstat/bin/
Copy “batstat” binary file to your PATH, for example /usr/local/bin/.
$ sudo cp batstat /usr/local/bin/
Make it executable using command:
$ sudo chmod +x /usr/local/bin/batstat
Finally, run the following command to view your battery status.
As you see in the above screenshot, my battery is in charging mode.
This utility has some limitations though. As of writing this guide, batstat will support only one battery. And, it gathers information only from this folder – “/sys/class/power_supply/”. If your machine contains the battery information on a different folder, this program will not work.
For more details, check batstat github page.
Method 4: Using “battery-level-cli” Program
The battery-level-cli is yet another command line utility to display the battery level in Linux. Unlike the “batstat” program, it will only display the battery level. It won’t help you to find whether the battery is charging or not. It is written in NodeJS, so make sure your system has NodeJS installed.
Once NodeJS installed, tun the following command to install “battery-level-cli” utility:
$ npm install --global battery-level-cli
Now, you can view the battery level using command:
$ battery-level 100%
For more details, check the project’s GitHub repository:
There might be many commands and programs out there to check the laptop battery status from Terminal in Linux. As far as I know, the above given methods have worked just fine as expected. If you know some other commands/utilities to find out the battery status, let me know in the comment section below. I will check and add them as well.
And, that’s all for now. More good stuffs to come. Stay tuned!