batterybooster: readme update

apps/batterybooster/README.md

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+# Battery Booster
+
+A Bangle.js app designed to optimize battery life through smart screen and power management features.
+
+## Features
+
+### 1. Auto Soft-Off
+- Automatically puts the watch into soft-off mode after 3 hours (10,800,000 ms) of being locked
+- This feature is activated when the watch is locked and cancelled when unlocked
+
+### 2. Dynamic Screen Timeout
+- Sets LCD timeout to 2 seconds when the watch is locked
+- Extends LCD timeout to 10 seconds when the screen is touched
+- Helps preserve battery life while maintaining usability
+
+### 3. Adaptive Brightness Control
+- Automatically adjusts screen brightness based on the time of day
+- Uses a sinusoidal pattern that follows natural daylight:
+  - Peak brightness at noon
+  - Lowest brightness at midnight
+  - Gradual transitions in between
+- Updates brightness every hour
+
+## How It Works
+The app runs in the background and manages three main aspects of power consumption:
+1. Screen timeout duration
+2. Automatic soft-off functionality
+3. Time-based brightness adjustment
+
+This combination of features helps extend battery life while maintaining a good user experience.