Compaq Armada 7400 14.4V Replacement Battery 104724-001

Compaq Armada 7400 Series — 14.4V Li-ion Replacement Battery (104724-001)

This 14.4V Li-ion battery pack replaces the original power cell in Compaq Armada 7400 series notebooks, including the 6300, 6266, 6433, and 6400 model variants. Capacity is 4400mAh (63.36Wh), matching the OEM specification. It fits the physical bay and connector of the Armada 7400 chassis without modification.

• Armada 7400 series compatibility: All listed Armada 7400 variants share the same 14.4V battery rail, physical form factor, and connector pinout. The BMS handshake uses the same SMBus protocol across the 6266, 6300, 6433, and 6400 sub-models, so one cell SKU covers the full range.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Armada 7400 platform. The BMS communicated correctly over SMBus, accepted a full charge without thermal cutoff, and reported state-of-charge data to the system without error flags.
• First-cycle calibration for Armada 7400: After installing, let the notebook discharge completely to hibernate cutoff, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting battery health as poor immediately after replacement

The Armada 7400 BIOS reads health data from the battery's EEPROM on first contact. When a new cell arrives, the EEPROM contains factory default values that don't match the laptop's learned discharge profile, so the BIOS flags it as degraded. This is not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — this writes new baseline data to the BIOS battery learn register and clears the warning.

Armada 7400 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge overestimates remaining charge, and when real cell voltage drops under combined CPU and display load, the pack hits its BMS cutoff voltage before the OS expects it. The fix is two to three full discharge and recharge cycles, which allow the fuel gauge IC to map the new cell's voltage-to-capacity curve accurately. After calibration, the shutdown threshold should align with 0–5% displayed charge at approximately 10.8V under load.