About this replacement
HP Business Notebook 2230s / Presario CQ20 — 14.4V Li-ion Replacement Battery (482372-322)
This 14.4V, 2200mAh (31.68Wh) Li-ion cell replaces the original battery in the HP Business Notebook 2230s and Presario CQ20 series. It slots directly into the same bay and connects to the same charge controller as the factory unit. Cross-reference OEM part numbers 482372-361, 493202-001, HSTNN-OB77, HSTNN-XB77, NBP4A112, and 530975-341 to confirm fitment before ordering.
- 2230s and CQ20 platform compatibility: Both the Business Notebook 2230s and the Presario CQ20 series share the same 14.4V battery bay, connector pinout, and EEPROM handshake protocol — which is why a single cell covers both product lines across multiple SKUs.
- Bench tested on actual hardware: We ran this cell on a 2230s unit and confirmed the BMS handshake completed without fault codes, the charge controller accepted full 14.4V nominal, and the fuel gauge IC registered the new cell without requiring manual override.
- Post-install calibration on the 2230s: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after fitting the new cell
The 2230s reads EEPROM data stored on the battery's protection circuit to populate the health percentage shown in BIOS and Windows. When a new cell arrives, that EEPROM data doesn't yet match the charge history the BIOS expects to see. The system flags this as degraded health — even at 100% charge — because the learn cycle hasn't run yet. One full discharge-to-hibernate followed by a complete uninterrupted charge clears the mismatch and resynchronises the fuel gauge IC to the new cell's actual capacity curve.
Laptop shutting down at 20–30% battery remaining shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold under full CPU and display load, even though the OS fuel gauge still reads 20–30%. The fuel gauge IC is calibrated to an old discharge curve and doesn't predict the voltage cliff accurately on a new cell. It's not a fault with the replacement — it's a calibration lag. Run two to three full discharge-to-recharge cycles and the fuel gauge will re-anchor its curve; shutdown should then occur at or below 5% as reported.