BatteryRemapper

BatteryRemapper is a lightweight, headless Xposed/LSPosed module designed for modern, highly customized Android environments. It recalibrates the operating system's battery reporting scale, mapping a physical battery range of 20% – 80% directly into a displayed 0% – 100% layer.

By constraining your operational cycle to these healthy thresholds, this module dramatically slows down chemical aging and extends the longevity of your device's physical lithium-ion battery.

🚀 Features

- Linear Scale Remapping: Compresses a physical 60% battery capacity swing (20% to 80%) into a seamless, user-facing 0% to 100% display layer. - Dynamic Intent Interception: Hooks deeply into the Intent.getIntExtra layer within the System UI, making it highly compatible with modern, heavily modified custom AOSP ROMs. - Smart Hysteresis Battery Saver Automation: Automatically manages your Android Battery Saver profile based on your remapped percentages to eliminate constant state-toggling: - Triggers ON: Automatically forces Battery Saver mode ON the moment your remapped scale drops to 20% or below. - Triggers OFF: Automatically forces Battery Saver mode OFF when your remapped scale charges past 50%. - Hysteresis Dead-Zone: Keeps the existing power state completely stable between 21% – 50% when unplugged to prevent power-flickering. - Charging Bypass: Instantly kills and disables Battery Saver mode the moment a charger (AC/USB/Wireless) is connected, allowing unthrottled charging performance. - 30-Second Shutdown Countdown: When your physical battery drops to your absolute limit of 20% (showing 0% on screen), a system-level alert dialog pops up with a 30-second countdown. - Smart Charger Abort: Plugging in your charger at any point during the 30-second countdown instantly cancels the shutdown sequence and dismisses the alert dialog. - Pure SystemUI Execution: Runs with zero root shell overhead (su) or permanent kernel-level RAM corruption by executing completely within the trusted com.android.systemui scope.

⚙️ LSPosed Setup Configuration

To ensure the module functions correctly, you must configure its scope properly inside your LSPosed / Vector Manager interface.

Target Scope:

- System UI (com.android.systemui)

ℹ️ Important

This module is engineered to run inside the System UI process. This ensures that your status bar, quick setting tiles, and lock screen graphics safely reflect your custom 0-100% scale, while your device's core Android system server still maintains accurate tracking of physical metrics.

📈 How the Math Works

Because the module maps a 60-point physical range into a 100-point display range, every 1% change in physical battery translates to about 1.66% on screen.

- 80% and above Displayed battery: 100% Behavior: upper charge ceiling cap.

- 65% Displayed battery: 75% Behavior: intermediate remapped value.

- 51% Displayed battery: 51% Behavior: Battery Saver turns off if unplugged.

- 25% Displayed battery: 8% Behavior: low battery threshold, Battery Saver is on.

- 20% and below Displayed battery: 0% Behavior: triggers the 30-second shutdown countdown.

⚠️ Drawbacks & Warnings

- Stepped Percentage Drops: Because of the compressed mathematical mapping, your status bar percentage will occasionally skip digits (e.g., jumping directly from 77% to 75%). This is intended, native mathematical behavior. - Kernel Supply Access: Apps that pull battery data bypassing the Java framework directly from the Linux kernel file node layer (/sys/class/power_supply/battery/capacity) will still read the true physical percentage rather than your remapped scale.

📱 Supported Devices & Environment

- Environment Requirement: Functioning Zygisk environment via Magisk or KernelSU. - Framework Requirement: LSPosed / Vector Framework. - Target Architecture: Verified on modern Android 16 AOSP architectures (specifically tested on custom implementations like Evolution X and crDroid builds). - ROM Compatibility: Fully compatible with heavily modified status bar engines that deploy custom battery styles like Circles, Dotted Icons, Landscape pills, and Text indicators.

License

MIT