Philips FC8820 14.4V Cordless Vacuum Replacement Battery 2600mAh

Philips FC8820 / FC8810 / FC8830 — 14.4V Li-ion Replacement Battery (4ICR19/65)

This is a 14.4V 2600mAh Li-ion replacement battery for the Philips FC8820, FC8810, FC8830, and FC8832 cordless vacuum cleaners. It slots into the same bay as the original 4ICR19/65 cell pack and connects to the same BMS circuit the charger handshakes with. Capacity is sourced from product data at 2600mAh / 37.44Wh.

• FC88xx series platform fit: The FC8810, FC8820, FC8830, and FC8832 share the same 14.4V battery bay, connector pinout, and BMS communication protocol — that is why one cell pack covers the range. Voltage rail and physical dimensions are identical across these models.
• Bench tested on actual hardware: We ran the pack through full charge and discharge cycles on the FC8820 motor circuit. The BMS responded correctly to overcurrent conditions during simulated filter-restriction loads and resumed normal output once load cleared.
• Dock charging habit on cordless vacuums: Do not leave this vacuum sitting on the charging dock permanently. Continuous trickle charge on Li-ion cells accelerates capacity fade. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the BMS expects — usually because a partially blocked filter forces the motor to work harder. The BMS reads the elevated current draw as a low-cell-voltage condition and reduces output power to protect the cells, even though capacity remains. Clean or replace the filter first. If suction restores immediately, the battery is not the cause. If the problem persists with a clean filter on a new battery, check that cell voltage at the pack terminals reads above 13.5V under load.

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

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked brush roll, clogged filter, or sealed nozzle — the motor stalls briefly and current spikes. The BMS cuts output to prevent cell damage, then resets once current drops. Clearing the obstruction stops the cycle. If the cutout happens on an open, unrestricted nozzle, measure pack voltage immediately after cutout — a reading below 12V points to a cell at end of life rather than a blockage issue.