About this replacement
ETA 0442 Verto — 6V Ni-MH Replacement Battery (0442 900000)
This is a 6V, 2000mAh Ni-MH replacement battery for the ETA 0442 Verto cordless handheld vacuum cleaner. It fits directly in place of OEM parts 0442 900000 and 0442 900001. Capacity is 2000mAh (12Wh), matching the original cell specification.
- 0442 Verto platform fit: Both OEM part numbers — 0442 900000 and 0442 900001 — use the same 6V cell format, connector pinout, and BMS handshake. This battery covers both variants without modification.
- Bench tested on actual hardware: We ran the cell through full charge and discharge cycles on the 0442 Verto platform. The BMS accepted charge correctly and held voltage within the expected operating window throughout the discharge cycle.
- Dock charging on the 0442 Verto: Do not leave the vacuum sitting on the charging dock after it reaches full charge. The 0442 Verto's dock delivers a continuous trickle that degrades Ni-MH cells faster than a standard charge-and-remove cycle. Charge until full, then disconnect.
Suction dropping before the battery indicator reaches low on the 0442 Verto
This happens when a partially blocked filter forces the motor to draw more current than its rated load. The extra draw pulls the battery voltage down faster than the indicator circuit expects. The indicator reads cell voltage, not remaining capacity, so it lags behind the real state. Clean or replace the filter first — if suction recovers immediately, the battery was fine.
Motor cutting out mid-clean and then recovering after a few seconds
This is a BMS overcurrent trip, not a dead battery. When the vacuum picks up a blockage or the filter is restricted, sustained motor load spikes current above the BMS threshold. The BMS cuts the circuit to protect the cell, then resets once current drops. Clear the pickup nozzle and filter before assuming the battery is faulty. If trips continue with a clean filter, check that resting cell voltage reads at least 6.0V before use.