Klarstein Cleanmate 14.4V Ni-MH Replacement Battery 4000mAh

Klarstein Cleanmate / Cleanfriend Veluce R290 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 4000mAh Ni-MH replacement battery for the Klarstein Cleanmate and Cleanfriend Veluce R290 robotic vacuum cleaners. It slots into the same battery compartment as the original cell and restores autonomous cleaning operation when the factory pack has lost capacity. Capacity and voltage figures come directly from the product specification — 57.6Wh total energy.

• Cleanmate and Veluce R290 platform: Both models run the same 14.4V battery rail with a matching connector and BMS communication profile, which is why one cell covers both. Swapping to a mismatched voltage pack will trip the onboard protection circuit immediately.
• Bench tested on actual hardware: We cycled this cell under a sustained motor load representative of carpet navigation. The BMS held voltage above the cutoff threshold through full discharge cycles and resumed charge acceptance without requiring a manual reset.
• Dock charging on robotic vacuums: Do not leave the Cleanmate sitting on the charging dock indefinitely between cleaning sessions. Ni-MH cells on continuous trickle charge develop capacity fade significantly faster than cells charged only when depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

Ni-MH cells under a restricted motor load show voltage sag well before the pack reaches true depletion. On the Cleanmate, a partially blocked filter forces the motor to draw above its rated current, which causes the cell voltage to drop early and suction to fall noticeably. The onboard indicator reads state of charge, not instantaneous voltage sag, so it can still show mid-range while suction has already degraded. Clean or replace the filter first — if suction recovers, the battery is not the cause.

Motor cutting out mid-clean and then recovering on its own

This is a BMS overcurrent trip, not a dead battery. When the Cleanmate's brush roll catches debris or hair, suction restriction spikes current draw sharply, and the BMS cuts the output circuit to protect the cell. The pack resets itself once current demand drops — which is why the vacuum appears to restart on its own. Clear the brush roll and check the filter for blockage. If trips continue on a clear machine, measure resting voltage at the battery terminals — a healthy 14.4V Ni-MH pack should read 15.6V or above after a full charge.