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6e89272bce
The HAT (E) uses a dedicated BMS MCU (not an INA219) at I2C address 0x2D. It exposes charge state, pack voltage/current, per-cell voltages, remaining capacity in mAh, and time-to-empty/full estimates directly via I2C registers. Tested on Raspberry Pi 4B with pyMC_Repeater running pymc-battery-writer. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>