About this replacement
RobZone Duoro / Duoro Profi — 14.4V Li-ion Replacement Battery
This is a 14.4V, 2600mAh Li-ion replacement battery for the RobZone Duoro and Duoro Profi cordless stick vacuums. It slots into the same battery bay as the original cell and connects to the same BMS communication circuit. No OEM part number is published for this cell — the Duoro and Duoro Profi share identical battery architecture.
- Duoro and Duoro Profi compatibility: Both models run the same 14.4V motor rail and use the same battery housing and connector pinout. One cell fits both without modification.
- Bench tested on actual hardware: We ran this cell through charge cycles and monitored BMS behaviour under sustained motor load. The protection circuit held cutoff voltage correctly and did not trip under normal suction cycles.
- Dock charging on cordless vacuums: Do not leave the Duoro sitting on its charging dock continuously. Unlike a phone, this vacuum has no dock-detection circuit to pause trickle charge once full. Charge to full, then remove it from the dock.
Suction dropping before the battery indicator reaches low on the Duoro
The Duoro's motor draws significantly more current when the filter is partially blocked — sometimes two to three times its clean-filter draw. That elevated current causes voltage to sag at the cell before the indicator circuit registers a low-battery state. The result is reduced suction with the indicator still showing partial charge. Clean the filter first. If sag continues on a clean filter, the cell has lost capacity and needs replacing.
Motor cutting out mid-clean and recovering after a few seconds
This is a BMS overcurrent trip, not a power switch fault. When suction is restricted — blocked filter, tangled brush roll, or a sealed floor contact — motor current spikes beyond the BMS threshold and the protection circuit cuts output. The cell recovers once current drops below the trip point, which is why the vacuum restarts after a brief pause. Clear the blockage and check the filter. If trips continue on an unblocked machine, measure resting cell voltage — a cell below 14.0V at rest has deteriorated and will trip under normal load.