About this replacement
HP Pavilion Touchsmart 14 / 15 — 14.8V Li-ion Replacement Battery (728460-001)
This 14.8V, 2200mAh (32.56Wh) Li-ion cell replaces the original HP battery across the Pavilion Touchsmart 14 and Touchsmart 15 notebook lines. It fits a wide range of sub-models including the 14-N048CA and 14 B109WM. OEM part numbers covered include LA04, OA03, OA04, HSTNN-UB5M, HSTNN-UB5N, TPN-Q129 through TPN-Q132, and several hundred additional HP cross-references.
- Touchsmart 14 and 15 series compatibility: Both lines share the same 14.8V four-cell architecture, LA04/OA04 connector standard, and BMS handshake protocol — one cell fits both platforms without modification.
- Bench tested on actual hardware: We ran this cell on a Pavilion Touchsmart 14 chassis. The BMS negotiated correctly, charge acceptance reached full capacity, and the protection circuit responded to overcurrent and over-temperature thresholds as expected.
- First-cycle calibration on Touchsmart models: After installing, 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 on-screen after every cell swap.
BIOS reporting poor battery health after swapping the Touchsmart cell
The Pavilion BIOS reads health data from the battery's EEPROM on first contact. When a new cell arrives, the EEPROM counters are at zero and don't match the aged-profile the BIOS expects — so it flags the battery as unknown or degraded. This is a data mismatch, not a fault with the cell. Running one complete discharge-to-hibernate followed by an uninterrupted full charge gives the BIOS fuel gauge IC enough data to recalibrate. After two or three cycles the health indicator typically returns to normal.
Touchsmart shuts down unexpectedly at 20–30% charge shown
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load — the fuel gauge still reads 20–30% but the actual cell voltage has already hit the floor. It's a voltage-cliff problem common to Li-ion cells that have partially degraded, or to a new cell whose gauge IC hasn't calibrated yet. On a freshly installed cell, run the full discharge-and-recharge calibration cycle described above. If the shutdowns persist after three cycles, check that the BIOS is not limiting discharge — enter BIOS setup and confirm no battery protection floor is set above 3.0V per cell.