Rowenta Dual Force 2 in 1 Replacement Battery 18.5V 2500mAh

Rowenta Dual Force 2 in 1 — 18.5V Li-ion Replacement Battery (SS-9100043101)

This 18.5V, 2500mAh lithium-ion battery replaces the original pack in the Rowenta Dual Force 2 in 1 cordless vacuum. It fits the RH6735WH/AM0, RH6736WH/AM0, RH6737WH/AM0 and related models in the Dual Force range. Swap it out when the original pack no longer holds a useful charge or refuses to charge at all.

• Dual Force RH673x series fitment: These models share the same 18.5V battery rail, connector pinout, and BMS communication protocol. A single cell swap restores both the handheld and stick vacuum modes without any modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the RH6735WH platform. The BMS negotiated correctly with the Rowenta charger, cells balanced across all groups, and the overcurrent cutoff triggered at the expected threshold under a simulated blockage load.
• Dock charging discipline on the Dual Force: Do not leave the vacuum sitting on its charging dock permanently. Continuous trickle charge from the dock degrades cell capacity faster than normal use cycles. Charge to full and remove the vacuum from the dock until the next clean.

Suction dropping before the battery indicator reaches low

The Dual Force motor draws significantly more current when the filter is partially blocked or the brush roll is restricted. Under that extra load, the battery voltage sags earlier than the fuel gauge expects, so suction weakens while the indicator still shows adequate charge. The BMS reads actual cell voltage, not the indicator logic, and begins reducing power delivery to protect the cells. Clean the filter and clear the brush roll before assuming the battery is at fault — a clear airpath restores rated motor draw and the voltage sag disappears.

Motor cuts out mid-clean then restarts after a few seconds

This is a BMS overcurrent trip, not a flat battery. When sustained airflow restriction forces the motor to pull beyond the pack's rated current threshold, the BMS disconnects the output to protect the cells. The pack resets after a short thermal and electrical recovery window, which is why power returns without pressing any button. Check the filter — if it is clogged, cleaning it stops the trip from recurring. If the filter is clear and the cutout continues, measure resting pack voltage after a full charge; it should read at or above 21V.