About this replacement
ETA 5442 Verto — 14.8V Li-ion Replacement Battery (ETA544200090)
This is a 14.8V, 2600mAh lithium-ion battery that replaces part number ETA544200090 in the ETA 5442 Verto cordless vacuum cleaner. It slots into the same position as the original and connects to the same BMS interface. Capacity matches the factory specification at 38.48Wh.
- 5442 Verto fit: The Verto platform runs a 14.8V four-cell Li-ion pack with a specific connector orientation and BMS handshake. This replacement matches that cell configuration, so the vacuum's power management circuit recognises the pack and allows normal charge and discharge cycles.
- Bench tested on actual hardware: We ran the pack through charge and discharge cycles on the 5442 Verto platform. The BMS negotiated correctly on first contact — no error state, no charging refusal. Discharge curve held steady across the usable voltage window before the BMS stepped down the output near end-of-charge.
- Dock charging on the Verto: Do not leave the vacuum sitting on the charging dock between uses. The Verto's dock applies a continuous trickle once the pack is full, and repeated trickle exposure degrades cell capacity faster than normal cycle use. Charge to full, then remove it from the dock.
Cordless vacuum losing suction before the battery indicator reaches low
This happens when the motor is drawing more current than the BMS's steady-state threshold — usually caused by a partially blocked filter, not a failing battery. A restricted airpath forces the motor to work harder, pulling extra current and causing the BMS to throttle output voltage before the cell is actually depleted. The result looks like a battery problem but the cell still has charge. Clear the filter first, then retest under the same carpet load.
Motor cuts out mid-clean and then recovers after a short pause
This is a BMS overcurrent trip, not a dead battery. When suction is blocked — blocked nozzle, full dustbin, or clogged HEPA filter — the motor sustains a high-draw state that crosses the pack's overcurrent threshold. The BMS disconnects the output to protect the cells, then resets after the internal temperature drops. Fix the blockage, check the filter is seated correctly, and restart. If the trip happens immediately on a clear nozzle, measure pack voltage at rest — it should read above 15.5V on a full charge.