About this replacement
HP Pavilion dm3 Series — 11.1V Li-Polymer Replacement Battery (HSTNN-OB0L)
This 11.1V, 4400mAh (48.84Wh) Li-Polymer cell replaces the original battery in the HP Pavilion dm3 series, including the dm3-1001au, dm3-1014tu, dm3-1032tx, and over 145 additional configurations. It crosses to OEM part numbers HSTNN-OB0L, HSTNN-E02C, HSTNN-DB0L, HSTNN-UB0L, FD06, and 577093-001, among others. Physical dimensions match the original bay at 194.92 × 91.28 × 15.08mm.
- dm3 Series compatibility: All dm3 variants listed share the same 11.1V three-cell configuration, connector pinout, and BMS handshake protocol — which is why one cell covers the full lineup despite the range of regional SKUs and suffix variations.
- Bench tested on actual hardware: We ran this cell through full charge and load cycles on a dm3 unit, confirmed BMS communication on all pins, and verified the fuel gauge IC accepted the new cell without throwing a fault state or halting charge.
- Post-install calibration on the dm3: 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 in HP Support Assistant after a cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The dm3 BIOS reads health data stored in the battery's EEPROM, not just live voltage. When a new cell arrives, its EEPROM charge-cycle counter and capacity history don't match what the BIOS expects from a conditioned pack. The system flags this as degraded health even though the cell is new. Running one full discharge-to-hibernate then an uninterrupted full charge gives the BIOS enough data to update its health register and clear the warning.
dm3 shutting down abruptly while the OS still shows 20–25% remaining
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The IC is still using the old cell's voltage-to-capacity map, so it misreads where the voltage cliff sits under combined CPU and display load. The cell voltage drops faster than the gauge predicts, and the BMS trips the protection circuit before the OS can initiate a clean shutdown. Two to three full discharge-and-charge cycles recalibrate the IC; after that, the cutoff should track accurately down to the cell's 9.0V low-voltage protection threshold.