Midea G9 Cordless Vacuum Compatible Battery 22.2V 2500mAh

Midea G9 / G9 Plus / G9 Pro — 22.2V Li-ion Replacement Battery (G9BP-01)

This is a 22.2V 2500mAh (55.5Wh) lithium-ion replacement battery for the Midea G9, G9 Plus, and G9 Pro cordless stick vacuums. It replaces OEM part number G9BP-01 when the original cell loses charging capacity or stops holding charge. Fits the same connector and slot as the factory battery.

• G9, G9 Plus, and G9 Pro compatibility: All three models share the same 22.2V power rail, connector configuration, and BMS handshake protocol — that is why one battery covers the entire G9 range. Swapping between G9 variants does not require any firmware change or charger swap.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a G9 chassis. The BMS held steady voltage through both hard floor and carpet motor loads, with overcurrent protection tripping correctly when suction was deliberately blocked at the nozzle.
• Dock charging discipline: Do not leave the G9 sitting on the charging dock permanently. Continuous dock contact keeps the cell in a trickle charge state that accelerates capacity fade. Charge to full, then remove the vacuum from the dock until the next use.

Suction dropping before the battery indicator reaches low

On the G9, suction loss is often misread as a dying battery when the real cause is voltage sag under load. A partially blocked filter forces the motor to draw more current than rated, which causes the cell voltage to dip and the motor to slow — even when the indicator still shows charge remaining. Pull and clean the filter first before concluding the battery is the problem. If suction recovers after a filter clean, the cell is not at fault.

Motor cuts out mid-clean then comes back after a short pause

This is a BMS overcurrent trip, not a failed battery. When sustained suction restriction — a blocked nozzle, full dust cup, or clogged filter — pushes motor current above the BMS threshold, the protection circuit cuts power to prevent cell damage. After a brief pause the BMS resets and the motor restarts. Clear the blockage and check the dust cup fill level. If trips continue with a clean filter and empty cup, measure resting cell voltage — it should read above 22V before placing a charge.