Cecotec Conga 11090 Replacement Battery 14.4V 2600mAh 91046

Cecotec Conga 11090 Series — 14.4V Li-ion Replacement Battery (91046)

This 14.4V 2600mAh Li-ion battery replaces the original power cell in the Cecotec Conga 11090, Conga 11090 Spin Revolution Home&Wash, Rockstar Deepclean, and Rockstar Deepclean Essential robotic vacuums. It uses OEM part numbers 91046 and N160-4S1P. Capacity is rated at 37.44Wh, matching the original specification.

• Conga 11090 platform compatibility: All listed models share the same 14.4V cell architecture, connector pinout, and BMS handshake protocol. Swapping between these variants does not require firmware or hardware changes — the battery management system communicates identically across the range.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Conga 11090 platform. The BMS responded correctly to motor-start current draw, and the protection circuit tripped and reset as expected under simulated blockage load. No false low-battery cutoffs occurred during testing.
• Dock charging practice for the Conga 11090: Do not leave the Conga sitting on its dock continuously between cleaning sessions. Robotic vacuums on permanent trickle charge develop capacity fade significantly faster than units charged only when depleted. Charge to full, then remove from dock until the next scheduled run.

Suction dropping before the battery indicator reaches low on the Conga 11090

The Conga 11090 motor draws more current when airflow is restricted — a dirty or partially blocked filter makes this worse. As the cell ages and internal resistance rises, voltage sags under that elevated motor load before the indicator registers a low state. The robot may slow down, reduce suction, or return to dock prematurely while the indicator still shows a mid-level charge. Cleaning the filter and fitting a fresh cell eliminates both the false-low reading and the suction drop.

Motor cutting out mid-clean and then recovering after a few seconds

This is a BMS overcurrent trip, not a motor fault. When the Conga hits sustained carpet resistance or a partial blockage, current draw spikes beyond the protection threshold and the circuit interrupts power briefly. The BMS resets once current drops, which is why the robot restarts seconds later. Check the brush roll for tangled hair and clean the filter — both reduce the sustained load that triggers the trip. If the cutouts continue on a clean filter and clear brush roll, the original cell's capacity has degraded enough that its internal resistance is amplifying the current spike.