About this replacement
Roborock Dyad U10 / Dyad Air Wet — 22.2V Li-ion Replacement Battery (BPR-1P6S-5130A)
This 22.2V 4500mAh Li-ion battery replaces the original pack in the Roborock Dyad U10, Dyad Air Wet, and U10 wet-dry vacuum. It matches the OEM voltage rail and BMS handshake the motor controller expects. Part numbers BPR-1P6S-5130A and BCR-1P6S-5000B are both covered by this cell.
- Dyad U10 / Dyad Air Wet platform fit: These models share the same 6S Li-ion architecture, connector pinout, and BMS communication protocol. One replacement pack covers all three variants without modification.
- Bench tested on actual hardware: We ran this pack through the Dyad U10's motor-start sequence and sustained suction cycles. The BMS held voltage within spec under peak draw and did not trigger overcurrent cutoff during normal operation.
- Dock charging behaviour on the Dyad platform: Do not leave the vacuum sitting on the charging dock after it reaches full charge. The Dyad's dock does not cut trickle current aggressively enough to prevent capacity fade. Charge to full, then remove the unit from the dock.
Cordless vacuum losing suction before the battery indicator reaches low
This is a voltage sag issue, not a capacity issue. When the filter is partially blocked, the motor draws above its rated current to maintain suction pressure. That excess draw causes cell voltage to dip under load, which the BMS reads as a low-voltage event and throttles power — even if the indicator still shows two bars. Clean or replace the filter first, then test. If suction recovers fully, the battery was not the problem.
Motor cuts out mid-clean then restarts after a few seconds
This is a BMS overcurrent trip, not a failed battery. Sustained suction against a blockage — carpet fibres packed at the brush roll, or a clogged HEPA filter — drives current past the BMS protection threshold. The BMS shuts the output rail and resets after a short cooldown. Clear the blockage, confirm filter airflow is unobstructed, and restart. If the cut-out continues on a clear filter with a new pack, check that cell voltage under load stays above 18V.