HP Probook 400 14.8V Replacement Battery HSTNN-LB7A 2200mAh

HP ProBook 430 G3 / 440 G3 — 14.8V Li-ion Replacement Battery (HSTNN-LB7A)

This is a 14.8V, 2200mAh (32.56Wh) lithium-ion replacement battery for the HP ProBook 400 series, including the ProBook 430 G3 and 440 G3 notebooks. It replaces OEM part numbers HSTNN-LB7A, RO06XL, RO04, and 811347-001. Physically it measures 277.50 × 37.00 × 21.80 mm and seats in the same bay as the original pack.

• ProBook 430 G3 and 440 G3 compatibility: Both models share the same 14.8V four-cell battery rail, connector pinout, and BMS handshake protocol — which is why a single part number covers the whole G3 platform. The EEPROM on this cell carries the correct identification data so the BIOS recognises it without a firmware workaround.
• Bench tested on actual hardware: We ran this cell in a ProBook 440 G3 chassis and logged charge cycles through a full CC/CV sequence. The BMS accepted the charge controller handshake immediately, held cutoff at 16.8V, and the OS fuel gauge initialised without error on the first boot.
• ProBook G3 first-cycle calibration: After installing this battery, run one full discharge until the laptop hibernates on low-battery cutoff, then charge uninterrupted to 100%. This forces the ProBook's fuel gauge IC to recalibrate against the new cell's actual capacity and clears the inaccurate health warning the BIOS typically displays after any cell swap.

BIOS reporting battery health as "Poor" or "Unknown" after replacement

HP's BIOS reads battery health from EEPROM data embedded in the pack, not from a live capacity test. A new cell starts with a fresh EEPROM that contains no cycle history, which the BIOS can misread as degraded or unrecognised. Running HP's built-in battery check — or cycling the battery once from full to hibernate-cutoff and back — writes the correct baseline data into the fuel gauge IC. After one complete charge cycle, the health status should update to Normal.

ProBook shuts down at 20–30% charge shown on screen

This is a voltage cliff symptom, not a capacity problem. Under combined CPU load and full display brightness, the cell voltage drops faster than the fuel gauge IC can track, causing an abrupt shutdown while the OS still shows charge remaining. It happens most often in the first few cycles before the gauge IC has calibrated to the new cell's discharge curve. Run two full discharge-to-hibernate and charge-to-100% cycles, then recheck. If it persists, confirm cell voltage at shutdown using HP Support Assistant — it should not fall below 13.2V under load before the OS registers low battery.