Eufy Mach V1 T2750 Replacement Battery 22.2V 3800mAh

Eufy Mach V1 T2750 Wet & Dry — 22.2V Li-ion Replacement Battery (T2750-6S1P)

This 22.2V 3800mAh lithium-ion battery pack replaces the original power cell in the Eufy Mach V1 T2750 Wet & Dry and T2750G11 cordless vacuum cleaners. It matches the OEM part number T2750-6S1P and slots into the same battery housing without modification. Capacity is 84.36Wh — identical to the factory specification.

• T2750 and T2750G11 compatibility: Both models run the same 22.2V six-cell series configuration and share the T2750-6S1P battery format. The connector, BMS handshake, and cell arrangement are identical across the T2750 and T2750G11 variants, so one battery covers both.
• Bench tested on actual hardware: We cycled this pack on a T2750 unit under wet-pickup and dry-carpet loads. The BMS held stable across sustained high-draw passes and tripped correctly on deliberate blockage, then reset cleanly once airflow was restored.
• Dock charging habit on the T2750: Do not leave the Mach V1 sitting on the charging dock after the battery reaches full. Continuous dock contact keeps a trickle current through the cells and accelerates capacity fade. Charge to full, then remove the vacuum from the dock until the next use.

Cordless vacuum losing suction before the battery indicator reaches low

The T2750 motor draws significantly more current when the filter is partially blocked or the dirty-water tank creates back-pressure. Under that restricted load, cell voltage sags early — the battery indicator still reads mid-range, but the motor is already starved. The BMS reads real-time voltage, not a fuel-gauge estimate, so a voltage sag under load looks different from a resting low-charge reading. Clean the filter and empty the dirty tank first; if suction recovers, the battery is not the cause.

Motor cuts out mid-session and then restarts on its own

This is a BMS overcurrent trip, not a battery failure. When the suction path is restricted — blocked nozzle, saturated filter, or full dirty tank — the motor pulls above the BMS current threshold and the pack disconnects to protect the cells. The trip resets automatically once the draw drops. Clear the blockage, wait ten seconds, then power the vacuum back on. If the cutout returns immediately on a clear nozzle, measure resting pack voltage; anything below 19V indicates a degraded cell that needs replacement.