iRobot Roomba Combo Essential Replacement Battery 14.4V 2600mAh

iRobot Roomba Combo Essential Series — 14.4V Li-ion Replacement Battery (ABL-G)

This 14.4V 2600mAh lithium-ion battery replaces the OEM ABL-G pack in the iRobot Roomba Combo Essential Vacuum and Mop Robot. It fits the Roomba Combo Essential, Combo Essential 2, and Y011040 variants. Voltage and capacity match the original spec exactly.

• Combo Essential platform fit: The Roomba Combo Essential series uses a shared 14.4V battery rail and a single connector format across the Y011040 and Combo Essential 2 units. The BMS handshake protocol is consistent across these variants, so one pack covers all of them.
• Bench tested on actual hardware: We ran this pack through charge cycles on the Combo Essential dock. The BMS accepted the charger handshake on first connection, balanced cells correctly, and held charge termination at the expected cutoff voltage without false-full triggers.
• Dock charging discipline for the Combo Essential: The Roomba Combo Essential is a scheduled-use robot — it returns to dock between jobs and sits there for hours. Li-ion cells in continuous trickle charge degrade faster than cells cycled normally. Charge to full, then lift the unit off the dock until the next scheduled run.

Suction dropping before the battery indicator reaches low

This happens when the filter is partially blocked, forcing the motor to draw more current than rated to maintain airflow. Under that extra load, the battery voltage sags earlier in the discharge curve, and the Roomba cuts motor power before the fuel gauge catches up. The indicator reads mid-range because it tracks resting voltage, not loaded voltage. Clean or replace the filter first — if suction holds after that, the battery was not the cause.

Motor cutting out mid-clean and recovering after a few seconds

This is a BMS overcurrent trip, not a power failure. When suction is restricted — blocked brush roll, clogged filter, or hair wrap — the motor stalls briefly and pulls a current spike above the BMS threshold. The BMS opens the discharge circuit to protect the cells, then resets automatically after a short delay. Clear the blockage and check that the brush roll spins freely. If the cutout continues on a clear robot, verify cell voltage is above 12.0V resting before assuming a fault.