Philips C467-C1-7S1P Cordless Vacuum Compatible Battery 25.2V

Philips Cordless Wet & Dry 4000 (XW4122) — 25.2V Li-ion Replacement Battery (C467-C1-7S1P)

This is a 25.2V, 4500mAh lithium-ion battery for the Philips Cordless Wet & Dry 4000 series vacuum cleaner. It fits the XW4122 and XW4122/82 models and replaces OEM part C467-C1-7S1P. If your vacuum shuts off early, loses suction strength, or no longer charges past a low state, the cell pack is the likely cause.

• XW4122 and XW4122/82 fit: Both variants share the same 25.2V cell configuration, battery bay dimensions, and BMS handshake protocol. The connector and communication lines are identical across the range, so this pack seats and initialises without modification.
• Bench tested on actual hardware: We ran this pack through charge cycles on the XW4122 platform and monitored the BMS response under motor load. The cell voltage held stable across both wet and dry suction modes, and the protection circuit triggered correctly at the rated low-voltage cutoff.
• Dock charging habit on the XW4122: Do not leave the vacuum sitting on the charging dock between uses. The XW4122 dock does not interrupt charge when the pack is full. Continuous trickle charge accelerates cell degradation faster than normal use cycles. Charge to full, then remove it from the dock.

Suction dropping before the battery indicator reaches low

The XW4122 motor draws significantly more current when the filter is partially blocked or the dustbin is full. That elevated current causes cell voltage to sag under load, which the BMS reads as a low-battery condition even when the indicator still shows charge remaining. The motor throttles back to protect the pack, and suction drops noticeably. Clean the filter and empty the bin first — if suction restores fully, the battery is not the issue. If the problem continues with a clean filter, the existing cell pack has lost enough capacity that voltage sag is occurring at normal draw levels.

Motor cuts out briefly then recovers during use

This is a BMS overcurrent trip, not a power switch fault. It happens when sustained restricted airflow — a clogged filter, blocked nozzle, or dense carpet contact — forces the motor to pull more amperage than the protection circuit allows. The BMS cuts power momentarily, then resets once current drops. Check and clear the filter before concluding the battery is at fault. If the cutout continues on a clear airway with a new pack, inspect the nozzle inlet for obstructions and verify the floor head seal is not forcing the motor to work against a pressure restriction.