About this replacement
Philips PowerPro Aqua FC6400 Series — 14.8V Li-ion Replacement Battery (4ICR19/65)
This is a 14.8V, 2200mAh Li-ion battery pack for the Philips PowerPro Aqua FC6400 cordless wet and dry vacuum. It replaces OEM part number 4ICR19/65 and fits the FC6400, FC6400/01, FC6401/01, and related variants. Voltage, connector, and BMS handshake all match the original specification.
- FC6400 series compatibility: The FC6400, FC6400/01, and FC6401/01 all share the same 14.8V battery bay, connector pinout, and BMS communication protocol. One battery pack covers the full range without adapter or modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the FC6400 platform. The BMS negotiated correctly with the charger, and the protection circuit responded to both over-discharge and thermal events without false trips.
- Dock charging habit on the FC6400: Do not leave this vacuum on the charging dock continuously. The FC6400 dock does not terminate charge and switch to a true standby mode — trickle current continues and accelerates cell degradation. Charge fully, then remove it from the dock.
Suction dropping before the battery indicator reaches low
This happens when the motor is working harder than rated — usually a partially blocked filter forcing it to draw extra current. The battery voltage sags under that elevated load before the indicator registers a low charge state. The BMS reads the voltage drop as a near-empty pack and throttles output to protect the cells. Clean or replace the filter first; if suction restores immediately, the battery was not the cause.
Motor cuts out mid-run then recovers after a short pause
This is a BMS overcurrent trip, not a flat battery. Sustained restricted airflow — blocked filter, full dust bin, or a carpet blockage — drives motor current above the protection threshold. The BMS disconnects the output, the motor stops, and it resets once current demand drops. Clear the restriction, then check that resting voltage is above 14.0V before continuing use.