ETA 4228 Navaggio Profi 14.4V Replacement Battery 5200mAh

ETA 4228 Navaggio Profi — 14.4V Li-ion Replacement Battery (4228 00100)

This is a 14.4V, 5200mAh Li-ion replacement battery for the ETA 4228 Navaggio Profi cordless vacuum cleaner. It matches the OEM part number 4228 00100 and fits the Navaggio Profi's battery bay and connector. Voltage and capacity match factory spec — no modification needed.

• ETA 4228 Navaggio Profi fitment: The Navaggio Profi uses a 14.4V lithium-ion cell pack with a BMS that communicates discharge state to the motor controller. This replacement carries the same voltage rail and BMS profile, so the vacuum's motor controller reads charge state correctly across the full discharge curve.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a 14.4V Li-ion test rig. The BMS held cutoff at the correct low-voltage threshold and did not trip spuriously under simulated motor-load draw.
• Dock charging habit on the Navaggio Profi: Do not leave the Navaggio Profi sitting on its charger permanently. Continuous trickle current after full charge accelerates capacity fade in Li-ion cells. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low

On the Navaggio Profi, a partially blocked filter forces the motor to draw more current than rated to maintain airflow. The BMS reads that elevated draw as a voltage sag and begins throttling motor power early — before the battery indicator signals low. The vacuum feels like the battery is dying, but the root cause is restriction, not charge level. Clean or replace the filter and the power curve returns to normal across the full charge cycle.

Motor cuts out mid-clean and then restarts after a pause

This is a BMS overcurrent trip, not a failed battery. When suction is restricted — blocked nozzle, saturated filter, or heavy carpet fibre — motor current spikes above the BMS cutoff threshold, and the pack shuts the circuit to protect the cells. After a short pause, the BMS resets and the motor restarts. Clear the blockage and check the filter before assuming the battery is at fault. If trips continue on a clear airpath, check that the replacement BMS cutoff threshold matches the Navaggio Profi's rated draw at 14.4V.