Device Battery Level Detector: A Smart Utility for Web Devs & UX Optimizers

🔋 Know your user’s battery. Adapt your web app. Win the experience.
The modern web is all about context-aware performance — and battery level is one of the most overlooked signals.

This Device Battery Detector is a powerful little tool that uses the [Battery Status API] to detect:

• 🔋 Current battery level (in %)

• 🔌 Charging status (charging / not charging)

• ⏳ Battery discharging time (when supported)

• ⚡ Real-time status updates in the browser

Whether you’re building a PWA, an energy-efficient web game, or want to optimize your app behavior based on battery level (like disabling heavy animations, large downloads, or showing a “low battery mode”) — this utility is the perfect starting point.

⚙️ Key Features

• ✅ Uses native Battery-Manager API (no libraries)

• ✅ Clean HTML + JS code — plug-and-play

• ✅ Real-time updates with event listeners

• ✅ Fully browser-based — no backend needed

• ✅ Responsive UI — clear display of level & charging status

• ✅ Perfect for adding progressive enhancements to your app

🧠 Where This Tool Shines

• 💻 Progressive Web App (PWA) optimization

• 🎮 Game or media app battery-aware UX

• 🚨 Triggering low battery warnings / lightweight mode

• 👨‍🏫 Teaching environment variables, device APIs & browser capabilities

• 🔍 Debugging device behavior across devices

👨‍💻 Ideal For

• Frontend developers & UX designers

• PWA builders & service workers

• Code learners practicing API integration

• Tech YouTubers / teachers showing smart browser tricks

• Devs making “smart” sites with adaptive UI logic

📦 What You’ll Get

• 📁 index.html, style.css, script.js

• 🧠 Well-commented code — easy to read and modify

• 🧪 Works instantly in supported browsers

• ⚠️ Graceful fallback for unsupported environments