Liectroux B6009 Replacement Battery 14.4V 2600mAh

Liectroux B6009 — 14.4V Li-ion Replacement Battery

This 14.4V, 2600mAh lithium-ion battery replaces the original pack in the Liectroux B6009 robotic vacuum cleaner. It powers the drive motors, suction motor, and onboard navigation system. Capacity figure is taken directly from product data at 37.44Wh.

• B6009 platform fit: The B6009 runs a 14.4V motor rail for both drive and suction. This pack matches that voltage rail and the physical connector format the unit expects. A voltage mismatch here causes the BMS to refuse the charge cycle entirely.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles monitoring BMS response at start-up and during motor-load spikes. The protection circuit held correctly on overcurrent events without nuisance tripping under normal suction load.
• Dock charging behaviour on the B6009: The B6009 sits on a contact-charge dock between runs. That dock does not cut power when the cell reaches full charge — it maintains a trickle. Remove the vacuum from the dock once charging completes and only return it when the battery is depleted.

Suction dropping before the battery indicator reaches low

This happens because the suction motor draws more current when airflow is restricted — a partially blocked filter is the most common trigger. The extra draw causes voltage to sag across the cell before state-of-charge actually drops, so the indicator reads mid-range while suction is already weak. The BMS reads the voltage dip as a low-battery condition and begins throttling motor output to protect the cell. Clean or replace the filter first, then retest — if suction holds across a full charge cycle, the filter was the cause, not the battery.

Motor cuts out mid-run then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When the suction path is partially blocked, the motor stalls briefly and pulls a spike of current above the BMS threshold. The protection circuit opens, the motor stops, and after a few seconds the BMS resets and allows the motor to restart. Check the dustbin, filter, and brush roll for obstructions. If the vacuum runs cleanly with an empty bin and a clean filter, the cell and BMS are functioning correctly.