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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (How to get Battery status notification when a battery is full or low)
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[#]: via: (https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/)
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[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
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How to get Battery status notification when a battery is full or low
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======
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Linux laptops are good for Nix users, but it often drains the battery.
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I tried many Linux operating systems, but did not have a long battery life like Windows.
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Charging a battery for a longer duration will damage your battery, so unplug the power cable when it is 100% charged.
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There is no default application to notify when the battery charged or discharged, and you need to install a third-party application to notify you.
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For this, I usually install the **[Battery Monitor][1]** app, but it was deprecated, so I created a shell script to get the notification.
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Laptop battery charging and discharging status can be identified using the following two commands.
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Using acpi command.
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```
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$ acpi -b
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Battery 0: Discharging, 71%, 00:58:39 remaining
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```
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Using upower command.
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```
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$ upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -w 'state|percentage' | awk '{print $2}'
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discharging
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64%
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```
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### Method-1: Shell script to send an alert when the battery level is above 95% or below 20%
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This script runs in the background on startup and checks the battery status every minute and then sends a notification when the battery level is charged above 95% or discharged less than 20%.
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The alert will not go off until your battery is over 20% or less than 95% charged.
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```
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$ sudo vi /opt/scripts/battery-status.sh
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#!/bin/bash
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while true
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do
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battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
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if [ $battery_level -ge 95 ]; then
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notify-send "Battery Full" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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elif [ $battery_level -le 20 ]; then
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notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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sleep 60
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done
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```
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Once the script is ready, set the executable permission.
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```
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$ sudo chmod +x /opt/scripts/battery-status.sh
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```
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Finally, add the script to the bottom of the user profile file. For system-wide, you need to add the script on the /etc/profile file.
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```
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$ vi /home/magi/.profile
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/opt/scripts/battery-status.sh &
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```
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**[Reboot your Linux system][2]** to check this.
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```
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$ sudo reboot
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```
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### Method-2: Shell script to send a notification when the battery level is charged (above 95%) or discharged (below 20%)
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This script is similar to the above script, but it is responsible with the AC adapter.
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If your AC adapter is plugged in and the battery is charged above 95%, it will send a notification with a sound, but the notification will not stop until you unplug the AC adapter.
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![][3]
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If you unplug the AC adapter, you will never see the notification again until your battery charge drops to 20%.
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![][3]
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```
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$ sudo vi /opt/scripts/battery-status-1.sh
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#!/bin/bash
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while true
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do
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export DISPLAY=:0.0
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battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
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if on_ac_power; then
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if [ $battery_level -ge 95 ]; then
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notify-send "Battery Full" "Level: ${battery_level}% "
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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else
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if [ $battery_level -le 20 ]; then
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notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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fi
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sleep 60
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done
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```
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Once the script is ready, set the permission to execute.
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```
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$ sudo chmod +x /opt/scripts/battery-status-1.sh
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```
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Finally add the script to the bottom of the user **profile** file. For system-wide, you need to add the script on /etc/profile file.
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```
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$ vi /home/magi/.profile
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/opt/scripts/battery-status-1.sh &
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```
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Restart your system to check this.
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```
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$ sudo reboot
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```
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**Ref:** [stackexchange][4]
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--------------------------------------------------------------------------------
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via: https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/
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作者：[Magesh Maruthamuthu][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.2daygeek.com/author/magesh/
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[b]: https://github.com/lujun9972
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[1]: https://www.2daygeek.com/category/battery-monitor/
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[2]: https://www.2daygeek.com/6-commands-to-shutdown-halt-poweroff-reboot-the-linux-system/
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[3]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
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[4]: https://unix.stackexchange.com/questions/60778/how-can-i-get-an-alert-when-my-battery-is-about-to-die-in-linux-mint
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