AEG RX9-2-6IBM Robotic Vacuum Replacement Battery 7.4V 4500mAh

AEG RX9-2-6IBM Series — 7.4V Li-ion Replacement Battery (4060002609)

This 7.4V, 4500mAh Li-ion battery replaces part number 4060002609 in the AEG RX9-2 robotic vacuum range. It fits the RX9-2-6IBM, RX92-4ANM, and RX92-4STN models. When the original cell degrades and the robot cuts cleaning cycles short, this unit restores full operating capacity.

• RX9-2 platform compatibility: The RX9-2-6IBM, RX92-4ANM, and RX92-4STN share the same 7.4V battery bay, connector pinout, and BMS handshake protocol. One cell fits all three without modification.
• Bench tested on actual hardware: We ran this cell through the RX9-2 charge and wake cycle. The BMS negotiated correctly with the charger, the robot completed its mapping pass, and the protection circuit held voltage within the expected range across multiple discharge cycles.
• Dock charging habit on robotic vacuums: Do not leave the RX9-2 sitting on its dock between cleaning sessions indefinitely. Continuous trickle charging degrades Li-ion cells faster than normal cycling. Let the robot complete a full discharge, charge to 100%, then pull it from the dock if it won't run again within a day or two.

Suction dropping before the battery indicator reaches low on the RX9-2

The RX9-2 motor draws significantly more current when the filter is partially blocked or a brush roll is restricted. That elevated draw pulls cell voltage down early, and the BMS interprets the sag as a low-battery condition before the indicator reflects it. The robot then either reduces suction or returns to dock prematurely. Clean the filter and check the brush roll first — if suction recovers immediately, the cell was being over-stressed, not depleted. A healthy cell at 7.4V nominal should sustain full motor speed well past the halfway point of a cleaning cycle.

RX9-2 motor cutting out mid-cycle then recovering after a short pause

This is a BMS overcurrent trip, not a dead battery. When the brush roll encounters heavy carpet pile or a partial blockage, current demand spikes above the protection threshold and the BMS disconnects the output. The robot pauses, the BMS resets after a few seconds, and the motor restarts. This cycle will repeat until the restriction is cleared. Check the brush roll for hair wrap, inspect the filter, and confirm the intake path is clear — once airflow is restored, the motor current drops back into normal range and the trips stop.