Bq40370 Jun 2026

It communicates with the laptop motherboard's Embedded Controller (EC) via the SMBus / I2C protocol , transmitting telemetry like temperature, voltage, and remaining capacity.

You must "unseal" the chip before any resets can occur. Tools like the Laptop Battery Analyzer (NLBA1) are commonly used for unsealing and clearing PF flags. Reprogramming & Calibration: Tool Requirement: bq40370

Repair requires specialized firmware tools (e.g., Be2Works ) to reset the Permanent Failure (PF) flags and reprogram the EEPROM. Common Issues transmitting telemetry like temperature