Candy Hoover RBC004B011 Robo Replacement Battery 14.4V 3500mAh

Candy Hoover RBC004B011 Robo — 14.4V Ni-MH Replacement Battery

This is a 14.4V 3500mAh Ni-MH replacement battery pack for the Candy Hoover RBC004B011 Robo robotic vacuum and compatible models including the RBC007B011, RBC001011, and RBC002011. It replaces the original cell when capacity has degraded from repeated charge cycles. Dimensions are 90.06 x 69.53 x 45.45mm — verify physical fit against your existing pack before installing.

• RBC004B011 Robo series compatibility: These models share the same 14.4V power rail and battery bay geometry. The connector pinout and BMS handshake requirements are consistent across the listed variants, so one cell fits all without modification.
• Bench tested on actual hardware: We ran this pack through a full charge and multiple discharge cycles on the RBC004B011 platform. The BMS responded correctly to charge termination, and the protection circuit tripped as expected on overcurrent simulation — no runaway, no false cutoffs under normal load.
• Dock charging discipline for robotic vacuums: Do not leave the robot parked on its dock permanently between cleans. Robotic vacuums on continuous dock charge develop capacity fade significantly faster than units charged only when the battery is depleted. Charge to full, then remove from the dock.

Cordless vacuum losing suction before the battery indicator reaches low

On Ni-MH cells, voltage sag under load appears well before the pack is fully discharged. When the motor is working harder — due to a partially blocked filter or dense carpet — current draw spikes and pack voltage drops temporarily below what the motor controller expects. The vacuum reads this as low battery and reduces power or stops, even though the cell still holds charge. Clean the filter first — a clogged filter is the most common reason motor draw exceeds rated current on these units.

Motor cuts out mid-run then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked intake, full dustbin, dirty filter — the motor stalls briefly and draws a current spike that exceeds the protection circuit threshold. The BMS disconnects the cell, the motor stops, and after a short cooldown the circuit resets and the vacuum resumes. If this keeps repeating, clear the blockage and check the filter; if it continues on a clean machine, the original pack's cell resistance has risen high enough to cause voltage collapse on every motor start — replace the battery.