Smart Alerts
Set custom thresholds for full and low battery. Escalating notification backoff prevents alert fatigue — inspired by Duolingo's approach so you never get spammed.
Available on Windows & macOS
Battery Notifier
for WindowsmacOSLinux
Know exactly when to plug in and when to unplug. A tiny, free app that watches your battery so you don't have to.
It's free — but if it's useful, buy me a coffee ☕
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Downloads
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Latest
MIT
License
v… — Latest Release
Trusted by thousands across the web
What it doesSits in your tray.
Sits in your tray.
Speaks up when it matters.
Instant Charger Detection
Detects plug-in and unplug instantly. Shows time estimates like "45m to full charge" right in the tray.
16+ Notification Sounds
10 synthesized tones, 6 curated clips, or import your own .wav, .mp3, .m4a, .ogg, .flac, or .aac files.
System, Light & Dark
Three themes that follow your OS preference automatically. Looks native on every platform.
Focus Mode Aware
Respects Do Not Disturb and Focus modes on Windows and macOS. Alerts stay silent when you need to concentrate.
Auto Start
Launch at startup so it's always watching. Set it once and never think about it again.
Fully Open Source
Built with Avalonia UI and .NET 10. MIT licensed, no telemetry, no network calls. Settings encrypted at rest. Read every line on GitHub — or fork it.
Setup
Three steps. No account.
1
Download
Grab the latest release from GitHub. On Windows, unzip and run. On macOS, drag to Applications. No installer needed.
2
Configure
Set your low and full battery thresholds. Pick a notification sound. Takes about 10 seconds.
3
Forget about it
Battery Notifier sits in your system tray and only speaks up when your battery actually needs attention.
Get it
Download Battery Notifier
Free forever. Open source. No account required.
Enjoying Battery Notifier? Support the project — it means a lot.
FAQ
Common questions
Is Battery Notifier completely free?
Yes. 100% free and open source under the MIT license. No ads, no in-app purchases, no subscriptions, no account required.
Does it drain my laptop battery?
No. Battery Notifier is designed to be extremely lightweight. It runs quietly in the background using minimal system resources, so it has virtually zero impact on your battery life or performance.
Does it work on Windows 10 and Windows 11?
Yes. Fully compatible with Windows 10 and 11, including Windows 11's Efficiency Mode. Integrates natively with Windows notifications and the system tray.
What about macOS and Linux?
Battery Notifier is available for both Windows and macOS. Linux support is in development — follow the GitHub repo for updates.
How do I get full battery alerts?
Open Settings, enable "Full Battery" notifications, and set your threshold (e.g., 95%). Battery Notifier will alert you when your battery reaches that level, helping prevent overcharging.
How do I set low battery warnings?
In Settings, enable "Low Battery" notifications and set your threshold (e.g., 20%). You'll get an alert with enough time to find a charger.
Does it collect any data?
No. Zero telemetry, no network calls, no account. Runs entirely offline. The full source code is on GitHub for anyone to audit.
Can it help prevent overcharging?
Yes. Set a full battery notification at 80-90% and unplug before reaching 100%. This helps extend your battery's lifespan over time.
Is it better than the built-in Windows battery warning?
Windows only gives you a basic low battery warning at a fixed percentage. Battery Notifier adds customizable thresholds, full charge alerts, custom sounds, dark mode, quiet hours, and a much better system tray interface.
Can it start automatically with Windows?
Yes. Open Settings and enable "Launch at Startup". Battery Notifier will run automatically every time you boot.
Support
Keep this project alive ☕
No ads. No subscriptions. No VC funding. Just one developer maintaining it in spare time.
If it's useful, chip in
Free forever. Even a dollar helps keep it maintained.
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