About this replacement
Rowenta RH8827WO/2D0 Series — 25.2V Li-ion Replacement Battery (RS-RH5274)
This 25.2V, 2500mAh (63Wh) lithium-ion battery replaces the original RS-RH5274 pack in Rowenta cordless stick vacuums. It fits the RH8827WO/2D0, RH8827WO/2D2, RH8828, RH8828WO/2D0, and over 100 additional models in the same family. The OEM part numbers RS-2230001828 and RS-2230001688 also cross to this replacement.
- RH88 series compatibility: These models share a common 25.2V seven-cell Li-ion architecture, the same connector housing, and a BMS communication protocol that the vacuum's motor controller handshakes with at startup. Swapping between RH8827 and RH8828 variants works because the voltage rail and BMS signal are identical across the series.
- Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on an RH8828 unit. The BMS held the 25.2V nominal rail under sustained motor load and tripped overcurrent protection cleanly when suction was deliberately blocked — recovering without fault latching after the obstruction was cleared.
- Dock charging discipline for this vacuum: The RH88 series dock delivers a continuous trickle once the pack reaches full charge. Leaving the vacuum docked permanently accelerates capacity fade in Li-ion cells at this voltage tier. Charge the vacuum fully, then remove it from the dock until the next use.
Suction dropping before the battery indicator shows low
The RH88 motor controller watches the pack voltage under load, not at rest. A partially blocked filter forces the motor to draw above its rated current, which causes the pack voltage to sag even when the cells still carry a reasonable state of charge. The indicator reads the resting voltage and shows adequate charge, but under load the pack cannot sustain the voltage the motor needs. Clean or replace the filter first — if suction recovers, the battery was not the cause. If sag persists on a clean filter, check that the pack voltage at load does not drop below 21V.
Motor cuts out mid-use then restarts after a few seconds
This is a BMS overcurrent trip, not a dead cell. Sustained restricted airflow — a clogged filter, a blocked nozzle, or a tangled brush roll — drives motor current above the BMS protection threshold, and the pack shuts the output to protect the cells. The BMS resets automatically once current draw drops and the thermal sensors cool. Clear any blockage, check brush roll rotation, and confirm the filter is seated correctly before the next run.