The chip is usually "sealed" to prevent unauthorized access. Unsealing requires specific keys, which professional repair software can sometimes bypass or provide.
The bq40370 has a safety feature called Permanent Failure . If the chip detects a voltage imbalance greater than 400mV across cells, a shorted FET, or over-temperature, it blows an internal electronic fuse (or drives the CHG/DSG FETs off permanently). You cannot clear a PF flag without proprietary TI software (often requiring an unlock code from the OEM). Result: Recycled battery. bq40370
: It is commonly found in Dell battery models such as the GJKNX and NYFGH . The chip is usually "sealed" to prevent unauthorized access
Because it is customized for Dell, it often requires specific firmware-dependent plugins for software like bqStudio to read or edit its data flash. Common Field Use Cases If the chip detects a voltage imbalance greater
: Accessing the "unseal" codes or specific firmware features can be complex, as these chips are often password-protected by the manufacturer to prevent unauthorized repairs. How to Check Battery Health (Dell Laptops)