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sources/tech/20210113 How to get Battery status notification when a battery is full or low.md
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@ -1,157 +0,0 @@
[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: 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

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translated/tech/20210113 How to get Battery status notification when a battery is full or low.md Normal file
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@ -0,0 +1,157 @@
[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: 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/)
如何在电池充满或低电量时获得电池状态通知
======
对于类 Unix 用户来说，Linux 笔记本是不错的选择，但它经常会耗尽电池。
我试过很多 Linux 操作系统，但没有像 Windows 那样电池寿命长。
充电时间长了会对电池造成损害，所以在电池 100% 充满时要拔掉电源线。
电池充电或放电时没有默认的应用程序来通知，需要安装第三方应用来通知你。
为此，我通常会安装 **[Battery Monitor][1]**，但它已经被废弃，所以我创建了一个 shell 脚本来获取通知。
笔记本电池充放电状态可以通过以下两个命令来识别。
使用 acpi 命令。
```
$ acpi -b
Battery 0: Discharging, 71%, 00:58:39 remaining
```
使用 upower 命令。
```
$ upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -w 'state|percentage' | awk '{print $2}'
discharging
64%
```
### 方法 1：当电池电量高于 95% 或低于 20% 时，用 Shell 脚本发送警报
这个脚本在启动时在后台运行，每分钟检查一次电池状态，然后在电池电量超过 95% 或放电低于 20% 时发送通知。
警报会直到你的电池电量超过 20% 或低于 95% 时才会停止。
```
$ 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
```
脚本完成后，设置可执行权限。
```
$ sudo chmod +x /opt/scripts/battery-status.sh
```
最后，将该脚本添加到用户配置文件的底部。对于全局范围来说，你需要在 /etc/profile 文件中添加该脚本。
```
$ vi /home/magi/.profile
/opt/scripts/battery-status.sh &
```
**[重启你的 Linux 系统][2]**来检查这点。
```
$ sudo reboot
```
### 方法 2：当电池充电（高于 95%）或放电（低于 20%）时发送通知的 Shell 脚本。
这个脚本与上面的脚本类似，但它是由交流适配器负责。
如果你的交流适配器插上了，而且电池的电量超过 95%，它就会发出一个带有声音的通知，但是这个通知不会停止，直到你拔掉交流适配器。
![][3]
如果你拔掉交流适配器，你将永远不会再看到通知，直到你的电池电量下降到 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
```
脚本完成后，设置执行权限。
```
$ sudo chmod +x /opt/scripts/battery-status-1.sh
```
最后将脚本添加到用户 **profile** 文件的底部。对于全局范围来说，你需要在 /etc/profile 文件中添加该脚本。
```
$ vi /home/magi/.profile
/opt/scripts/battery-status-1.sh &
```
重启系统来检查。
```
$ sudo reboot
```
**参考：** [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：[geekpi](https://github.com/geekpi)
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