AC / Battery Switch Beeper

You shift on your chair, the laptop charger pops out, and you don't notice until the battery runs dry an hour later. This tiny program beeps the moment the power source switches between AC and battery, so you catch it instantly.

What it does

The program sits silently in the system tray. Windows tells it whenever the power source changes — AC adapter plugged in, AC adapter unplugged, battery installed, battery removed. Each event triggers a beep. That's the whole feature surface.

When you need it

• Laptops with a loose-fitting charger jack
• Workspaces where you regularly hand-carry the machine between desks
• Anyone who's run a battery flat from an accidentally-unplugged cord
• Power-strip surge events where AC briefly drops

Features

• Beep on AC-to-battery transition
• Beep on battery-to-AC transition
• Tiny resource footprint — sits in the tray, does nothing else
• Portable, no installer, no registry edits

System requirements

• Windows 7, 8, 10, 11 (older Windows versions also supported)
• A laptop or UPS (with a desktop on AC only, there's nothing to monitor)
• Working PC speaker or sound card