Philips FC6822 Replacement Battery 25.2V 3400mAh 1BD0346A

Philips FC6822 / FC6823 Series — 25.2V Li-ion Replacement Battery (1BD0346A)

This is a 25.2V, 3400mAh lithium-ion battery pack for the Philips FC6822 and FC6823 cordless stick vacuum range. It replaces OEM part 1BD0346A and fits the full series including /01 variants and 25 additional compatible models. Capacity figure is taken directly from product data — 85.68Wh.

• FC6822 / FC6823 series compatibility: These models share the same 25.2V battery rail, connector housing, and BMS handshake protocol. A single cell platform covers the full range, so one replacement fits the stick vacuum, detachable handheld unit, and dock-charged configurations across the series.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the FC6822 platform. The BMS communicated correctly with the charger, accepted full charge without fault codes, and delivered consistent voltage under both floor and carpet motor loads.
• Dock charging discipline on the FC6822: The FC6822 charging dock supplies continuous trickle current once the pack is full. Leaving the vacuum docked permanently accelerates capacity fade. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low

The FC6822 motor draws more current the moment airflow is restricted — a partially blocked filter forces the motor to work harder, pulling voltage down faster than the indicator registers. The BMS reads cell voltage, not filter state, so the indicator can still show two bars while suction has already degraded. This is not a battery fault. Clean or replace the filter first, then retest suction on a freshly charged pack. If suction restores, the battery was not the cause.

Motor cutting out mid-clean and then recovering after a few seconds

This is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage or a heavily loaded carpet, current draw spikes past the BMS threshold and the pack shuts the output to protect the cells. After a few seconds the BMS resets and power returns. Clear any blockage at the nozzle or hose, then check the filter. If trips continue on a clean filter and clear airflow, check that pack voltage at rest sits above 22V before charging — cells below that threshold may trigger the BMS on startup surge.