Ursus Trotter Excellenza CND 4S1P Compatible Battery 14.4V 1800mAh

Ursus Trotter Excellenza — 14.4V Ni-MH Replacement Battery (CND 4S1P)

This is a 14.4V, 1800mAh Ni-MH replacement battery for the Ursus Trotter Excellenza cordless vacuum cleaner. It replaces the original CND 4S1P cell pack when the existing battery can no longer hold a useful charge. Swap it in to restore cordless cleaning power without replacing the entire unit.

• Excellenza platform fit: The Excellenza runs a 14.4V motor rail with a Ni-MH cell pack — a chemistry the onboard charging circuit is tuned to handle. The CND 4S1P pack matches that voltage rail and connector geometry, so the charger communicates with the replacement pack the same way it did with the original.
• Bench tested on actual hardware: We cycled this pack through charge and load sequences on the Excellenza platform. The BMS held cutoff cleanly at low-cell voltage during sustained suction loads, and the charger terminated at full capacity without overcharge events.
• Dock charging habit on Ni-MH cells: Do not leave the Excellenza sitting on the charging dock continuously between uses. Ni-MH cells degrade faster under constant trickle charge than lithium chemistries do. Charge to full, then remove the vacuum from the dock until the next use.

Suction dropping before the battery indicator reaches low on the Excellenza

The Excellenza motor pulls harder when airflow is restricted — a clogged filter or partial blockage forces the motor to draw above its rated current even on a full pack. That elevated draw causes voltage sag across the Ni-MH cells, and the motor slows before the battery indicator registers low. The indicator measures resting cell voltage, not load voltage, so it lags behind what the motor is actually seeing. Clean or replace the filter first, then check whether suction holds steady across a full charge cycle.

Motor cuts out mid-clean and then recovers after a few seconds

This is a BMS overcurrent trip — the protection circuit detects a sustained current spike above safe limits and shuts the motor down temporarily. On the Excellenza, this usually happens when suction is restricted: a blocked filter or full dust cup forces the motor to work harder, spiking draw. The BMS resets itself once current drops, which is why the vacuum recovers after a brief pause. Clear the dust cup, check the filter condition, and confirm the pack reads at least 14.4V resting before writing off the battery.