CleanMate QQ-5a Replacement Battery 14.4V 2500mAh Ni-MH

CleanMate QQ-5a / QQ-5S / Pro QQ6 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 2500mAh Ni-MH replacement battery for the CleanMate QQ-5a, QQ-5S, and Pro QQ6 robotic vacuum cleaners. It slots into the same bay as the original pack and runs the drive motors and suction fan at the correct voltage rail. Capacity is rated at 36Wh — identical to the factory specification.

• QQ-5a, QQ-5S, and Pro QQ6 compatibility: All three models share the same 14.4V battery bay, connector orientation, and BMS communication protocol, which is why one pack covers the full range. Swapping between these models requires no adapters.
• Bench tested on actual hardware: We cycled this pack through full discharge and recharge on a QQ-5a unit. The BMS accepted the cell correctly, maintained stable voltage under combined drive and suction load, and did not trigger overcurrent cutoff during carpet-resistance simulation.
• Dock charging habit on robotic vacuums: Do not leave the QQ-5a sitting on the dock continuously between cleaning sessions. Robotic vacuums on permanent dock charge receive a constant trickle that degrades Ni-MH cells significantly faster. Charge to full, then remove the unit from the dock until the next run.

Suction dropping before the battery indicator reaches low

This is a voltage sag issue, not always a capacity issue. When the filter is partially blocked, the suction motor draws more current than rated to maintain airflow. That extra draw pulls the pack voltage down under load faster than the indicator — which reads resting voltage — can track. The result is reduced suction while the indicator still shows a full or mid charge. Clean the filter first. If sag continues on a clean filter, the cell itself has lost capacity and needs replacing.

Motor cuts out mid-clean then restarts on its own

This is a BMS overcurrent trip, not a loose connection. It happens when sustained restricted airflow — usually a clogged filter or a tangled brush roll — forces the motor to pull current beyond the BMS threshold. The pack shuts the output, the motor stops, and the BMS resets after a few seconds. Check the filter and brush roll before assuming the battery is faulty. If the cutout still occurs after clearing the restriction, measure pack voltage at rest — it should read above 14.0V. Below that, the cells are weak enough that normal motor-start current is triggering the trip.