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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How to get Battery status notification when a battery is full or low)
+[#]: via: (https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+How to get Battery status notification when a battery is full or low
+======
+
+Linux laptops are good for Nix users, but it often drains the battery.
+
+I tried many Linux operating systems, but did not have a long battery life like Windows.
+
+Charging a battery for a longer duration will damage your battery, so unplug the power cable when it is 100% charged.
+
+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.
+
+For this, I usually install the **[Battery Monitor][1]** app, but it was deprecated, so I created a shell script to get the notification.
+
+Laptop battery charging and discharging status can be identified using the following two commands.
+
+Using acpi command.
+
+```
+$ acpi -b
+Battery 0: Discharging, 71%, 00:58:39 remaining
+```
+
+Using upower command.
+
+```
+$ upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -w 'state|percentage' | awk '{print $2}'
+discharging
+64%
+```
+
+### Method-1: Shell script to send an alert when the battery level is above 95% or below 20%
+
+This script runs in the background on startup and checks the battery status every minute and then sends a notification when the battery level is charged above 95% or discharged less than 20%.
+
+The alert will not go off until your battery is over 20% or less than 95% charged.
+
+```
+$ sudo vi /opt/scripts/battery-status.sh
+
+#!/bin/bash
+while true
+do
+  battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
+   if [ $battery_level -ge 95 ]; then
+      notify-send "Battery Full" "Level: ${battery_level}%"
+      paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
+    elif [ $battery_level -le 20 ]; then
+      notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
+      paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
+  fi
+ sleep 60
+done
+```
+
+Once the script is ready, set the executable permission.
+
+```
+$ sudo chmod +x /opt/scripts/battery-status.sh
+```
+
+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.
+
+```
+$ vi /home/magi/.profile
+
+/opt/scripts/battery-status.sh &
+```
+
+**[Reboot your Linux system][2]** to check this.
+
+```
+$ sudo reboot
+```
+
+### Method-2: Shell script to send a notification when the battery level is charged (above 95%) or discharged (below 20%)
+
+This script is similar to the above script, but it is responsible with the AC adapter.
+
+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.
+
+![][3]
+
+If you unplug the AC adapter, you will never see the notification again until your battery charge drops to 20%.
+
+![][3]
+
+```
+$ sudo vi /opt/scripts/battery-status-1.sh
+
+#!/bin/bash
+   while true
+    do
+       export DISPLAY=:0.0
+       battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
+       if on_ac_power; then
+           if [ $battery_level -ge 95 ]; then
+              notify-send "Battery Full" "Level: ${battery_level}% "
+              paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
+           fi
+       else
+           if [ $battery_level -le 20 ]; then
+              notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
+              paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
+           fi
+       fi
+     sleep 60
+done
+```
+
+Once the script is ready, set the permission to execute.
+
+```
+$ sudo chmod +x /opt/scripts/battery-status-1.sh
+```
+
+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.
+
+```
+$ vi /home/magi/.profile
+
+/opt/scripts/battery-status-1.sh &
+```
+
+Restart your system to check this.
+
+```
+$ sudo reboot
+```
+
+**Ref:** [stackexchange][4]
+
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/
+
+作者：[Magesh Maruthamuthu][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.2daygeek.com/author/magesh/
+[b]: https://github.com/lujun9972
+[1]: https://www.2daygeek.com/category/battery-monitor/
+[2]: https://www.2daygeek.com/6-commands-to-shutdown-halt-poweroff-reboot-the-linux-system/
+[3]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
+[4]: https://unix.stackexchange.com/questions/60778/how-can-i-get-an-alert-when-my-battery-is-about-to-die-in-linux-mint