Cecotec CONGA 1290 Replacement Battery 14.4V 3000mAh

Cecotec Conga 1290 / 1390 / 1490 / 1590 Series — 14.4V Li-ion Replacement Battery (CONG0003)

This is a 14.4V 3000mAh Li-ion replacement battery for the Cecotec Conga 1290 robotic vacuum. It fits the Conga 1290, 1390, 1490, and 1590 series. Swap it in when the original cell no longer holds enough charge to complete a full cleaning cycle.

• Conga 1290–1590 series compatibility: These four models share the same 14.4V battery rail, physical connector, and BMS handshake protocol. The same cell works across all of them without modification.
• Bench tested on actual hardware: We ran this battery through charge and discharge cycles on a Conga unit and confirmed the BMS communicated correctly with the dock charger — no false full-charge trips or premature cutoffs.
• Dock charging habit for the Conga platform: Do not leave the Conga sitting on the charging dock permanently between uses. Continuous trickle charging accelerates capacity fade in Li-ion cells at this voltage tier. Charge to full, then remove the unit from the dock until the next run.

Suction dropping before the battery indicator reaches low

The Conga's motor draws significantly more current when the filter is partially blocked or the intake is restricted. As current demand spikes, the BMS reduces power delivery to protect the cell — the result is a noticeable suction drop even though the battery indicator still shows charge remaining. This is not a battery fault. Clean the filter and check the intake path first. If suction recovers after that, the battery is functioning correctly.

Motor cuts out mid-cycle then recovers after a few seconds

This is a BMS overcurrent trip. When the motor sustains a restricted draw — usually from a clogged filter or a tangled brush roll — the cell voltage sags below the BMS protection threshold and the unit shuts off briefly. Once the BMS resets, power returns. The fix is to clear the restriction, not to replace the battery. If cutouts continue on a clean filter and clear brush roll, measure resting cell voltage at the dock connector — it should read 16.4V at full charge.