Linux Battery Unplug Reminder script (FruitJuice)

fruitjuice.sh

#! /bin/bash
#Adapted from https://linoxide.com/linux-how-to/remind-unplug-charging-laptop-arch-linux/
# DEBUG=true #uncomment to enable logging
MIN_BAT=40
MAX_BAT=80
log(){
  datestamp=$(date +%Y-%m-%d_%H:%M:%S)
  msg="$@"
  echo "[$datestamp]- $msg"
}
debug_log (){ 
	if [ -n "$DEBUG" ]; then
	  log "$@";
	fi
}

debug_log "start"
while true ; do
debug_log "in loop"
  UNPLUGGED=$(acpi -a | grep -i off-line)
  BAT_PERCENTAGE=$(acpi|grep -Po "[0-9]+(?=%)")
	debug_log "unplugged status: $UNPLUGGED"
	debug_log "Current bat percentage: $BAT_PERCENTAGE"
  if [ $BAT_PERCENTAGE -le $MIN_BAT ]; then # Battery under low limit
    debug_log "bat low"
    notify-send "Battery under $MIN_BAT%. Please plug in the adapter"
  elif [ $BAT_PERCENTAGE -ge $MAX_BAT ]; then # Battery over high limit
    debug_log "bat high"
    if [ "$UNPLUGGED" == "" ]; then # plugged
    debug_log "bat plugged"  
    notify-send "Battery above $MAX_BAT%. Please unplug the adapter"
    fi
  fi
  debug_log "sleeping"
  sleep 30 #Repeat every 30 seconds
done