Philips FC6169/01 Replacement Battery 18V 3000mAh Li-ion

Philips FC6169/01 Series — 18V Li-ion Replacement Battery (69-2008-009-223)

This 18V 3000mAh Li-ion battery replaces the original power pack in the Philips FC6169/01 cordless stick vacuum and fits a range of compatible models including the FC6168, FC6168/01, and FC6405/01. It delivers the same voltage and capacity as the factory cell, restoring full suction power to the motor drive circuit. Capacity is 54Wh.

• FC6168 and FC6405 series compatibility: These models share the same 18V motor rail, connector format, and BMS handshake protocol as the FC6169/01, which is why a single cell covers the range. Swapping to a different voltage would trip the motor controller and prevent operation.
• Bench tested on actual hardware: We ran this cell through charge cycles on the FC6169/01 platform and confirmed the BMS communicates correctly with the charger — charge termination triggered at expected voltage without error codes or cutoff faults.
• Dock charging habit on this vacuum: Do not leave the vacuum permanently docked between uses. The Philips charging dock does not cut power once the cell is full — continuous trickle current accelerates capacity fade in Li-ion cells. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the cell can sustain at its present state of charge, causing voltage to sag below the motor controller's threshold before the indicator registers low. A partially blocked filter is the most common trigger — restricted airflow forces the motor to work harder and pull higher current spikes. The BMS doesn't cut out entirely, but the motor runs at reduced speed. Clean or replace the filter first, then recharge the cell to 18V before concluding the battery is at fault.

Motor cuts out mid-use then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction — caused by a blockage or saturated filter — forces continuous high-draw operation, the BMS trips the output circuit to protect the cell. The recovery after a short pause is the BMS resetting once current demand drops. Clear any blockage, check the filter, and resume use. If the cutout happens again on an unblocked vacuum with a clean filter, check that cell voltage reads at least 16V under light load before ruling out a weak cell.