Dirt Devil BY001 Replacement Battery 10.8V 2200mAh Li-ion

Dirt Devil BD45000 Black Lightweight Cordless Hard Floor Broom — 10.8V Li-ion Replacement Battery (BY001)

This is a 10.8V, 2200mAh lithium-ion replacement battery for the Dirt Devil BD45000 Black Lightweight Cordless Hard Floor Broom Vacuum Cleaner. It uses OEM part number BY001 and slots into the same bay as the original pack. Capacity is rated at 2200mAh (23.76Wh) — confirmed against product data, not estimated.

• BD45000 platform fit: The BD45000 runs a 10.8V cell architecture with a specific connector and BMS handshake. This replacement matches that voltage rail and communication protocol so the vacuum's motor control board recognises the pack and allows full power draw.
• Bench tested on actual hardware: We ran this cell through the BD45000's charge and discharge cycle. The BMS held charge acceptance correctly, cutoff activated at the low-voltage threshold, and the motor received consistent voltage through the full discharge curve — no mid-cycle drops or error flags.
• Dock charging on the BD45000: Do not leave the vacuum on its charging dock indefinitely. Continuous dock connection exposes lithium cells to trickle current after full charge, which accelerates capacity fade. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor pulls more current than the BMS expects — usually because a partially blocked filter forces the motor to work harder. The BMS reads the elevated draw as a low-cell-voltage event and throttles output early. The battery indicator lags behind because it measures voltage, not load-adjusted capacity. Clear the filter first; if suction recovers immediately, the battery is not the root cause.

Motor cuts out mid-clean and then recovers after a few seconds

That pause-and-recover pattern is a BMS overcurrent trip, not a dead battery. Sustained restricted airflow — from a clogged filter or blocked nozzle — spikes current draw past the pack's cutoff threshold. The BMS disconnects to protect the cells, then resets once current normalises. Check and clean the filter; if the cutout persists on a clear filter, verify the replacement cell's BMS threshold matches the BD45000's motor spec at 10.8V.