Eureka NEW400 Replacement Battery 22.2V 2500mAh BP22225B

Eureka NEW400 Wet/Dry Cordless Mop Vacuum Cleaner — 22.2V Li-ion Replacement Battery (BP22225B)

This is a 22.2V 2500mAh (55.5Wh) lithium-ion replacement battery for the Eureka NEW400 Wet/Dry Cordless Mop Vacuum Cleaner. It replaces OEM part BP22225B directly. When the original cell pack degrades and the vacuum loses suction sooner than expected, this is the swap.

• NEW400 series fit: The NEW400 runs a 22.2V six-cell Li-ion pack with a BMS that monitors cell voltage balance and current draw from the motor. This replacement matches that voltage rail and connector, so the BMS handshake completes and the vacuum powers on normally without triggering a fault.
• Bench tested on actual hardware: We ran this pack under simulated motor load and cycled it through full charge and discharge. The BMS held within expected cutoff thresholds at both ends — no premature low-voltage shutdown and no overcurrent trip at motor start.
• Dock charging habit on the NEW400: Do not leave the NEW400 on the charging dock continuously. Cordless vacuums on permanent dock charge develop capacity fade faster than those charged only when the pack is depleted. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low on the NEW400

This happens when a partially blocked filter forces the motor to draw more current than its rated load. The BMS sees elevated current draw and steps down power delivery to protect the cells — suction drops even though the battery still shows charge. The battery is not the fault here. Clean or replace the filter, then retest. If suction restores immediately, the filter was the cause, not the pack.

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

This is a BMS overcurrent trip, not a dead battery. When the motor pulls sustained current above the BMS threshold — usually from restricted airflow — the BMS shuts the output to protect the cells. After a brief cool-down, the BMS resets and the vacuum runs again. Clear the filter and check for a blockage in the suction path. If the motor runs without cutting out after clearing the restriction, the pack is functioning correctly — confirm cell voltage is above 20V at rest before ruling out a worn pack.