To communicate with a BQ40370, you need specialized hardware and software:
Many versions are customized for specific laptop vendors, making them difficult to reprogram with standard tools. NLBA1 Laptop Battery Analyzer and Repair Tool 🛠 Common Use Cases & Hardware bq40370
| Feature | | bq40z50 / bq40z80 | bq28z610 | | :--- | :--- | :--- | :--- | | Algorithm | Impedance Track | Impedance Track | Impedance Track | | Cell Count | 2S – 4S | 2S – 4S | 1S – 2S | | Target Market | High Accuracy, Industrial/Medical | General Purpose, High Volume | Compact Packs, Wearables | | Balancing | Passive Balancing during Charge/Rest | Passive Balancing | Passive Balancing | | Key Differentiator | High integration, robust safety profile. | Successor device with similar features. | Lower cell count, smaller form factor. | To communicate with a BQ40370, you need specialized
| Feature | | BQ40Z50 | | :--- | :--- | :--- | | Algorithm | Impedance Track (Gen 2) | Impedance Track (Gen 5) | | Series Cells | 2 to 4 cells | 1 to 4 cells (with taps) | | Protection | Basic OV, UV, OT, Short | Enhanced (pre-charge, CTO, FET temp) | | Current Drive | Standard PFETs | High-side NFET drivers (more efficient) | | Legacy Support | Linux kernel support (old) | Requires new SMBus drivers | | Availability | NRND (Not Recommended for New Designs) | Active | | Lower cell count, smaller form factor
: If cells were over-discharged, a "Clear Chip Errors" command is used to remove the PFF after the hardware is fixed. Calibration Best Practices To ensure accurate "relearning" of the battery's capacity: