About this replacement
HP ProBook 5330m — 14.8V Li-Polymer Replacement Battery (635146-001)
This is a 14.8V, 2700mAh (39.96Wh) Li-Polymer replacement battery for the HP ProBook 5330m 13.3-inch business notebook. It fits the ProBook 5330m series across multiple regional variants, including the LV720PA, QC518PA, and SP451UC. OEM cross-references include FN04, HSTNN-DB0H, QK648AA, and 634818-271.
- ProBook 5330m series compatibility: All ProBook 5330m variants share the same 14.8V four-cell Li-Polymer voltage rail, connector pinout, and BMS handshake protocol — that is why one part number covers the full regional lineup.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a ProBook 5330m unit. The BMS completed the full handshake, reported cell presence correctly in BIOS, and charge termination triggered cleanly at 16.8V across all four cells.
- Post-install calibration on the ProBook 5330m: After fitting this battery, 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 battery health as poor after replacement
The ProBook 5330m BIOS reads health data stored in the battery's EEPROM. When a new cell is installed, the EEPROM contains factory defaults that don't match the BIOS's accumulated charge history from the old battery. The system flags this mismatch as a health warning — it is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a full uninterrupted charge completes the battery learn cycle and clears the warning.
ProBook 5330m shutting down at 20–30% charge shown
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge estimates remaining charge using data from the old, degraded cell — so it reads 25% while the new cell is already near its voltage floor. Under full CPU and display load, the cell hits its low-voltage cutoff faster than the gauge predicts, and the laptop shuts off without warning. Run two to three full discharge-to-hibernate and full recharge cycles until the gauge stabilises — the cutoff should shift below 10% once calibration is complete.