BatteryMu

A live battery monitor for MustardOS Andromeda on the Anbernic RG35XX family (all Allwinner H700 — Pro, Plus, H, SP, 2024). Built with LÖVE2D on the shared fskit kit.

Download BatteryMu-1.0.0.muxapp View Source on GitHub

Features

Real-Time Telemetry: Live charge %, voltage window, and charging/discharging state.
Battery Health Analysis: Design vs. current voltage readout and calculated battery health.
MustardOS Charge History: Charge history graph powered by the MustardOS battery_usage tracker (last charged timestamp, session time, capacity at unplug).
Universal Hardware Fallback: Reads MustardOS pre-parsed battery values first, falling back to raw AXP2202 sysfs nodes across every RG35XX variant.
8-Color Theme Picker: Shared in-app theme palette with ClockMu and JarMu.
Safe Scaling: Letterboxed 640×480 render — safe on every RG35XX panel variant and HDMI video output.

Gamepad Controls

Button	Action
D-pad Up/Down	Scroll through battery metrics & session logs
X	Cycle between 8 in-app theme colors
Y	Toggle extended voltage and health telemetry
B	Quit to MustardOS

Technical Architecture

BatteryMu targets the X-Powers AXP2202 Power Management IC (PMIC) present on all Allwinner H700 Anbernic handhelds:

/sys/class/power_supply/axp2202-battery/
├── capacity         # Current battery percentage
├── voltage_now      # Real-time microvolts
├── current_now      # Discharge / charge current
└── status           # Charging / Discharging / Full

When running bare without MustardOS helper daemons, BatteryMu reads these nodes directly, ensuring continuous accuracy even during testing.

Installation

Download the latest .muxapp from BatteryMu Releases.
Copy it to ARCHIVE/ on your SD card.
On the device: Applications → Archive Manager, select the file.
Launch from Applications → BatteryMu.