Vileda 137173 Cordless Vacuum Replacement Battery 14.4V 4000mAh

Vileda 137173 Cleaning Robot — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 4000mAh Ni-MH replacement battery for the Vileda 137173 and 137173 Cleaning Robot cordless vacuum. It fits directly into the original battery slot and restores power to units where the factory cell has degraded from repeated charge cycles. No OEM part number exists for this cell — fitment is confirmed by voltage, form factor, and connector type.

• Vileda 137173 and 137173 Cleaning Robot fit: Both models run the same 14.4V power rail, use the same connector housing, and draw current through the same motor driver circuit — a single cell spec covers both units without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on the 137173 motor assembly. The BMS handled motor-start inrush without tripping, and voltage held stable across sustained suction load until the cell reached cutoff.
• Dock charging on the 137173: Do not leave the vacuum on the charging dock once the battery is full. Continuous trickle charge from the dock degrades Ni-MH cells faster than cycling. Charge to full, remove the unit from the dock, and return it only when the battery is depleted.

Suction dropping before the battery indicator reaches low

Ni-MH cells lose voltage under load before they lose total capacity — the indicator reads remaining charge at rest, not under motor draw. When the filter is partially blocked, the motor pulls more current to maintain suction, which accelerates voltage sag. The battery can appear at mid-charge while the motor is already struggling to maintain its rated speed. Clean the filter first, then check whether suction recovers — a blocked filter is the most common cause of early power fade on this unit.

Motor cuts out mid-use and then restarts after a short pause

This is a BMS overcurrent trip, not a dead battery. When airflow is restricted — blocked filter, clogged inlet, or hair wrapped around the brush — the motor draws sustained current above the BMS threshold, and the circuit opens to protect the cell. After a brief pause the BMS resets and the motor restarts. The fix is not a new battery. Clear the restriction, check the filter, and verify the brush roll spins freely before drawing any conclusions about cell condition.