About this replacement
ETA Milio 2446 Series — 18V Ni-MH Replacement Battery (ETA244600080)
This is an 18V, 2000mAh Ni-MH replacement battery for the ETA 2446 and Milio cordless handheld vacuum cleaners. It fits models 244690000 and the 2446 90000 platform. Swap it in to restore motor power to a vacuum that has lost suction strength or no longer holds a charge.
- 2446 platform compatibility: The 2446 and Milio share the same 18V motor rail and physical pack configuration. This battery uses the same connector layout and BMS voltage profile as the original ETA244600080, so the charger handshake completes normally without triggering a fault state.
- Bench tested on actual hardware: We cycled this pack on a 2446-series unit under both bare-floor and carpet resistance loads. The BMS held steady through the motor-start current spike and did not trip under sustained high-draw conditions at full filter restriction.
- Dock charging on cordless vacuums: Do not leave the vacuum sitting on the charging dock permanently. Ni-MH cells in continuous trickle charge lose capacity measurably faster than cells charged only when depleted. Charge fully, then remove from the dock.
Suction dropping before the battery indicator reaches low
This happens when the motor draws more current than the pack can deliver at its present state of charge, pulling the cell voltage below the BMS cutoff threshold early. A partially blocked filter forces the motor to work harder, which increases current draw and accelerates voltage sag. The battery indicator reads remaining charge, not motor load — so it can show mid-range while the pack is already struggling under the extra draw. Clean the filter first, then recharge to full and retest; a clear airpath reduces motor current back to rated draw.
Motor cutting out mid-clean and then recovering after a short pause
This is a BMS overcurrent trip, not a dead battery. When suction is restricted — by a clogged filter or a blockage in the nozzle — the motor stalls slightly and pulls a current spike the BMS reads as a fault. The BMS shuts the output, the motor stops, and after the pack cools briefly the BMS resets and allows restart. The pause is the BMS recovery timer, typically 5–15 seconds on this cell chemistry. Clear the blockage or filter restriction and the current draw drops back within the BMS trip threshold, stopping the cycle of cutouts.