Cecotec Conga 7490 Ultimate 14.4V Replacement Battery 94120

Cecotec Conga 7490 Ultimate Genesis — 14.4V Li-ion Replacement Battery (94120)

This is a 14.4V 2600mAh Li-ion replacement battery for the Cecotec Conga 7490 Ultimate Genesis, Conga 7490 Ultimate, and Conga 7490 Immortal Genesis robotic vacuum cleaners. It replaces OEM part number 94120 and restores cleaning performance when the original cell has degraded. Voltage and capacity match the original battery specification exactly.

• Conga 7490 series compatibility: The Ultimate Genesis, Ultimate, and Immortal Genesis variants share the same 14.4V battery bay, connector pinout, and BMS handshake protocol. A single cell covers all three models without modification.
• Bench tested on actual hardware: We ran this battery through charge and discharge cycles on the Conga 7490 platform. The BMS accepted the charger handshake without fault codes, and cell voltage held stable under sustained motor load across hard floor and medium-pile carpet passes.
• Dock charging habit on robotic vacuums: Do not leave the Conga 7490 sitting on the charging dock permanently between sessions. Continuous trickle charge through the dock degrades cell capacity faster than charging only when the battery is depleted. Charge to full, then remove from the dock if the unit will sit idle for more than a day.

Suction dropping before the battery indicator reaches low on the Conga 7490

The Conga 7490 motor draws significantly more current when the filter is partially blocked or when transitioning from hard floor to carpet. Under that increased load, a degraded cell cannot hold the voltage rail steady, and suction drops even though the indicator still shows charge remaining. This is voltage sag, not a capacity problem — the cell cannot deliver the peak current the motor demands. Clean the filter before fitting the replacement battery, then run a full charge cycle. After a full charge, cell voltage at rest should read 16.4V across the terminals.

Conga 7490 motor cuts out mid-clean and then recovers on its own

This is a BMS overcurrent trip, not a battery fault. When the brush roll or suction path is restricted — blocked filter, tangled hair on the brush, or a stuck side brush — the motor pulls above the BMS current threshold and the BMS shuts the cell off to protect it. The unit recovers once current demand drops. Clear the restriction first: remove and clean the filter, check the brush roll for tangles, and confirm the dust bin is not full. If the cutout continues on a clear robot with no blockage, the original cell's BMS is the likely cause — the replacement cell's BMS is rated for the motor's normal surge current.