Karcher RCV 2 Replacement Battery 14.4V 3350mAh

Karcher RCV 2 — 14.4V Li-ion 3350mAh Replacement Battery

This is a 14.4V 3350mAh Li-ion replacement battery for the Karcher RCV 2 robotic vacuum cleaner. It fits directly into the RCV 2 chassis and restores cleaning capacity when the original cell has degraded. Capacity is sourced from product data at 3350mAh (48.24Wh).

• RCV 2 platform fit: The RCV 2 uses a fixed 14.4V Li-ion architecture with a BMS that monitors cell voltage and current draw across navigation, brush motor, and suction motor loads simultaneously. This replacement matches that voltage rail and connector geometry so the BMS handshake completes on first charge.
• Bench tested on actual hardware: We ran this cell through charge cycles and monitored BMS cutoff behaviour under simulated load conditions — suction motor ramp, brush engagement, and sustained run. The protection circuit held within spec and did not false-trip during motor-start current spikes.
• Dock charging habit on the RCV 2: Do not leave the RCV 2 sitting on its dock continuously between cleaning sessions. Robotic vacuums on permanent dock charge trickle-charge the cell around the clock, accelerating capacity fade well ahead of normal cycle life. Charge to full, then remove from the dock until the next scheduled clean.

Suction dropping before the battery indicator reaches low on the RCV 2

This happens when the suction motor is working harder than rated due to a partially blocked filter or brush roll restriction. Higher motor current draw pulls cell voltage down faster than the BMS indicator predicts, so the vacuum loses suction while the gauge still reads mid-charge. The BMS is not at fault — the motor is drawing above its rated current baseline. Clean the filter and clear the brush roll, then retest; if suction stabilises, the cell is fine.

RCV 2 motor cuts out mid-clean then restarts after a short pause

This is a BMS overcurrent trip, not a dead battery. When suction airways are restricted, the motor draws a sustained current spike that crosses the BMS protection threshold, and the circuit opens to protect the cell. After a brief thermal and current recovery period the BMS resets and the motor restarts. Clear the filter, inlet, and brush housing completely, then check that the replacement cell sits flush in the battery bay — a loose fit increases internal resistance and lowers the trip threshold.