Cecotec 49CE1533 CONGA 3290 Replacement Battery 14.4V 3200mAh

Cecotec CONGA 3290 / 3390 / 3490 / 3590 — 14.4V Li-ion Replacement Battery (49CE1533)

This 14.4V 3200mAh lithium-ion battery replaces part number 49CE1533 in the Cecotec CONGA 3290 and compatible CONGA 3390, 3490, and 3590 robot vacuums. The CONGA series runs autonomous floor cleaning cycles across hard floors and carpet, drawing sustained current from start to finish. Capacity is 46.08Wh, matched to the original cell specification.

• CONGA 3290–3590 platform fit: These four models share the same 14.4V battery bay, connector pinout, and BMS communication protocol — the robot's firmware reads cell state through the same handshake across the range, so one cell covers all four.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a CONGA unit and confirmed the BMS negotiated correctly — no error codes, no false low-battery cutoffs under normal suction load.
• Dock charging behaviour on CONGA units: Do not leave the CONGA on the charging dock between every clean. Robot vacuums on continuous dock charge receive a trickle charge that accelerates capacity fade in Li-ion cells. Charge to full, then remove from dock until the next scheduled run.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the cell can sustain at its present state of charge — voltage sags under load before the indicator registers a low reading. A partially blocked filter makes it worse: restricted airflow forces the motor to work harder, pulling current spikes that trigger early voltage sag. The BMS reads the sag as near-depletion and begins throttling motor power. Clean the filter first, then check that cell voltage at rest sits above 14.0V before starting a cycle.

Motor cutting out mid-cycle and restarting on its own

This is a BMS overcurrent trip — not a dead battery. When suction is restricted by a blocked filter or tangled brush roll, the motor draws a sustained current spike above the BMS cutoff threshold. The BMS disconnects the cell to protect it, then resets after a few seconds. The cycle repeats if the restriction remains. Clear the brush roll and filter, then restart the unit — if the cutout stops, the cell is fine and the obstruction was the cause.