A Python script to monitor MacBook battery health. It checks the battery's maximum capacity and sends a macOS notification if the capacity falls to 80% or below. Useful for keeping an eye on battery health and knowing when it might be time to consider servicing or replacing the MacBook's battery.

battery-health-check.py

#!/usr/bin/env python3
import subprocess
import re
import os

def get_battery_health():
    # Run the system_profiler command to get battery information
    result = subprocess.run(["/usr/sbin/system_profiler", "SPPowerDataType"], capture_output=True, text=True)
    output = result.stdout

    # Extract the battery health percentage using regular expression
    match = re.search(r"Maximum Capacity:\s+(\d+)%", output)
    if match:
        return int(match.group(1))
    else:
        return None

def send_notification(message):
    # Send a macOS notification
    command = f'''
    osascript -e 'display notification "{message}" with title "Battery Health Alert"'
    '''
    os.system(command)

def main():
    health = get_battery_health()
    if health is None:
        print("Unable to determine battery health.")
    elif health <= 80:
        # print(f"Current battery health: {health}%")
        send_notification(f"Battery health is at or below 80% ({health}%). Consider servicing your battery.")

if __name__ == "__main__":
    main()