omarchy/bin/omarchy-battery-monitor

#!/bin/bash

# Designed to be run by systemd timer every 30 seconds and alerts if battery is low

BATTERY_THRESHOLD=10
NOTIFICATION_FLAG="/run/user/$UID/omarchy_battery_notified"

get_battery_percentage() {
  upower -i $(upower -e | grep 'BAT') | grep -E "percentage" | grep -o '[0-9]\+%' | sed 's/%//'
}

get_battery_state() {
  upower -i $(upower -e | grep 'BAT') | grep -E "state" | awk '{print $2}'
}

send_notification() {
  notify-send -u critical "Battery Low" "Time to recharge! (battery is at ${1}%)" -i battery-caution
}

BATTERY_LEVEL=$(get_battery_percentage)
BATTERY_STATE=$(get_battery_state)

if [[ "$BATTERY_STATE" == "discharging" && "$BATTERY_LEVEL" -le "$BATTERY_THRESHOLD" ]]; then
  if [[ ! -f "$NOTIFICATION_FLAG" ]]; then
    send_notification "$BATTERY_LEVEL"
    touch "$NOTIFICATION_FLAG"
  fi
else
  rm -f "$NOTIFICATION_FLAG"
fi