About this replacement
HP Envy 15-3000 Series — 14.8V Li-Polymer Replacement Battery (HSTNN-UB3H)
This 14.8V, 4850mAh (71.78Wh) lithium-polymer battery replaces the original cell in HP Envy 15-3000, 15-3100, 15-3200, and 15-3300 series laptops. It matches the OEM connector, BMS handshake protocol, and voltage rail used across this Envy generation. Fit is confirmed against OEM part numbers HSTNN-UB3H, HSTNN-DB3H, TPN-I104, LR08XL, and 660152-001 among others.
- Envy 15-3000 through 15-3300 compatibility: These four sub-series share the same 14.8V four-cell architecture, identical board connector, and the same BMS communication protocol — which is why one cell works across all of them without firmware differences.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an Envy 15-3000 chassis. The BMS handshake completed correctly, charge acceptance reached full rated capacity, and the BIOS recognised the cell without fault flags during our test cycles.
- Post-install calibration on the Envy 15: After fitting, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that routinely appears after any cell swap on this platform.
Why the Envy 15 BIOS reports poor battery health after a cell swap
The Envy 15 stores battery health data in EEPROM on the original cell. When you swap in a new cell, that EEPROM data is gone and the BIOS flags the battery as degraded or unknown — even though the new cell is full capacity. This is a data mismatch, not a hardware fault. Running one full discharge-to-hibernate then an uninterrupted charge to 100% lets the BIOS rewrite its learn-cycle data against the new cell. After two to three full cycles, the health indicator normalises.
Laptop shuts off at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The gauge loses track of actual remaining capacity and the laptop hits a voltage cliff — the cell voltage drops below the BMS cutoff threshold before the OS-reported percentage reaches zero. It is not a faulty cell. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100% to force the fuel gauge IC to map the new cell correctly. After calibration, shutdowns under load typically stop occurring above 10–12%.