Lowbattery warning will give low battery warning popup when battery is less than 20%. However you can simple edit macro value to whatever percentage you want and recompile it get notified at any specifed percentage.
Current service script is only available for systemd.
- libnotify (make dependency)
sudo make clean install
orsudo make clean install service
if you also want to install the service filesystemctl enable lowbattery.service
systemctl start lowbattery.service
Arch users can easily install form aur: https://aur.archlinux.org/packages/low-battery-warning-git