About this replacement
ETA 0439 Brilanto — 14.4V Ni-MH Replacement Battery (ETA43900070)
This is a 14.4V Ni-MH battery rated at 3000mAh (43.2Wh), built to replace the original ETA43900070 cell in the ETA 0439 Brilanto cordless vacuum. It fits the Brilanto handheld and stick vacuum platform directly. Swap it in when the original cell can no longer hold enough charge to finish a cleaning session.
- ETA 0439 Brilanto platform fit: The Brilanto runs a 14.4V Ni-MH battery pack with a specific connector and cell arrangement tied to its motor voltage rail. This replacement matches that voltage, cell count, and pack geometry so the vacuum's power circuit operates as the motor expects.
- Bench tested on actual hardware: We cycled this pack through discharge and recharge on a 14.4V Ni-MH test rig. The BMS held steady through load transitions, and the pack reached full rated capacity within three conditioning cycles without voltage anomalies.
- Dock charging on the Brilanto: Do not leave the Brilanto sitting on the charging dock continuously between uses. Ni-MH cells in cordless vacuums develop capacity fade significantly faster under constant trickle charge. Charge to full, then remove the vacuum from the dock.
Suction dropping before the battery indicator reaches low on the Brilanto
This happens when the motor draws more current than rated — usually because the filter is partially blocked. Restricted airflow forces the motor to work harder, pulling extra current and causing the Ni-MH pack's voltage to sag early under load. The vacuum feels like it's losing power, but the battery indicator may still show charge remaining. Clean or replace the filter first, then run a full discharge-recharge cycle to recalibrate the pack's behaviour under normal load.
Motor cutting out mid-use and then recovering after a short pause
This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction pushes current draw past the pack's protection threshold, the BMS shuts the output to protect the cells, then resets after the pack cools slightly. The vacuum starts again — but the same restriction will trigger another cutoff. Check the filter and clear any blockage in the nozzle or hose before concluding the battery is at fault. If the cutouts continue after clearing the airflow path, verify the replacement pack voltage reads at or above 14.4V on a multimeter before reinstalling.