About this replacement
HP Dragonfly G4 Series — 11.58V Li-Polymer Replacement Battery (SS06XL)
This is a 11.58V, 5800mAh (67.16Wh) Li-Polymer replacement battery for the HP Dragonfly G4 ultrabook. It fits the 85H83PA, 819A0EA, 81A52EA, 818W2EA, and related Dragonfly G4 variants. OEM cross-references include SS06XL, M64310-271, M73476-005, and TPN-DB0O.
- Dragonfly G4 platform fit: These Dragonfly G4 models share the same 11.58V three-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. The SS06XL designation covers the full G4 refresh line — swapping between listed models does not require firmware changes or hardware modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Dragonfly G4 unit. The BMS accepted the new cell without error, negotiated full charge capacity, and the BIOS fuel gauge updated correctly after a learn cycle. No charge rejection or protection-circuit trip occurred.
- Post-install calibration on the Dragonfly G4: 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 in HP Support Assistant after a cell swap.
BIOS reporting poor battery health immediately after replacement
The HP Dragonfly G4 BIOS reads health data from EEPROM embedded in the battery pack, not from live cell voltage alone. When a new cell is installed, the EEPROM profile does not match the BIOS's stored charge history, so it flags the battery as degraded or unknown. This is not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% allows the BIOS to re-learn the cell's actual capacity curve and clear the warning.
Dragonfly G4 shutting down at 20–30% charge shown on screen
This symptom appears when the fuel gauge IC has not yet calibrated against the new cell's voltage-to-capacity curve. The OS reads a voltage that maps to 20–30% on the old cell's profile, but the new cell hits a voltage cliff at that point under combined CPU and display load. The laptop cuts power before the gauge reaches zero. To fix it, complete two to three full discharge-to-hibernate and charge-to-100% cycles so the fuel gauge IC recalibrates. After calibration, shutdowns at that percentage should stop.