Tefal RG 7765 WH Cordless Vacuum Compatible Battery 14.8V

Tefal RG 7765 WH — 14.8V Li-ion Replacement Battery (RS-2230002091)

This is a 14.8V 3400mAh lithium-ion replacement battery for the Tefal RG 7765 WH cordless stick vacuum. It replaces OEM part RS-2230002091 directly. Fits both the RG 7765 WH and RG7765WH variants — same physical unit, different catalogue listings.

• RG 7765 WH platform fit: The RG 7765 WH runs a 14.8V four-cell Li-ion pack with a specific BMS handshake. This replacement uses the same cell configuration, connector pinout, and communication protocol so the vacuum's charge management circuit recognises the pack without fault codes.
• Bench tested on actual hardware: We ran this pack through charge cycles on the RG 7765 WH platform and confirmed the BMS accepted the cell group, balanced normally across all four cells, and passed overcurrent protection checks at motor-start draw.
• Dock charging on the RG 7765 WH: Do not leave this vacuum sitting on the charging dock continuously. Cordless vacuums in permanent dock contact receive a trickle charge that accelerates capacity fade over weeks. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low on the RG 7765 WH

This happens when the motor is drawing more current than rated due to a partially blocked filter or debris restriction. Under restricted airflow, the motor works harder, pulling the cell voltage down faster than normal discharge would. The BMS reads this voltage sag as a lower state of charge than the cells actually hold, so the indicator lags behind real depletion. Clean the filter first — if suction recovers and the indicator stabilises, the battery is not the cause.

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

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked nozzle, clogged filter, or carpet pile jammed in the head — the motor current spikes past the BMS protection threshold and the pack shuts the output to protect the cells. Clearing the restriction and waiting 10–15 seconds lets the BMS reset and restores power. If trips continue on a clear vacuum head, check cell voltage under load: the pack should hold above 13.2V at moderate draw.