Rowenta RS-AC3477 Minivac Extenso Replacement Battery 7.2V 2000mAh

Rowenta Minivac Extenso Series — 7.2V Ni-MH Replacement Battery (RS-AC3477)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Rowenta Minivac Extenso cordless hand vacuum. It fits the AC47, AC4769, AC476901, and related Minivac Extenso models that use the RS-AC3477 cell configuration. Capacity is sourced from product data at 2000mAh (14.4Wh).

• Minivac Extenso platform fit: The AC47 series models share the same 7.2V cell stack, connector orientation, and physical housing dimensions — 86.00 x 56.30 x 45.00mm — so one replacement cell serves the full model range without modification.
• Bench tested on actual hardware: We ran this cell through the Minivac Extenso motor circuit under sustained suction load. The BMS held stable voltage across the draw cycle and did not trip on normal carpet-level resistance. Cutoff only engaged at correct low-voltage threshold.
• Dock charging on the Minivac Extenso: Do not leave the vacuum sitting on the dock between uses. Continuous trickle charge through the Ni-MH cells accelerates capacity fade faster than regular charge-and-remove cycles. Charge to full, then pull it off the dock.

Suction dropping before the battery indicator reaches low

Ni-MH cells under motor load show voltage sag before the pack is fully depleted. On the Minivac Extenso, a partially blocked filter forces the motor to draw harder, which pulls the cell voltage down faster than normal. The vacuum loses suction pressure at the nozzle while the indicator still reads mid-charge. Clear the filter first — if suction recovers immediately, the battery is not the cause.

Motor cuts out mid-use then recovers after a short pause

This pattern points to a BMS overcurrent trip, not a dead cell. When the filter is restricted or the nozzle is blocked, sustained airflow resistance causes the motor to spike current draw beyond the BMS threshold. The BMS cuts power to protect the cell, then resets once current drops. Clean the filter and check the nozzle pathway — if the cut-out stops, the replacement cell is functioning correctly.