Proscenic S1 11.1V Replacement Battery H600-C409-A 2200mAh

Proscenic S1 Handheld Vacuum — 11.1V Li-ion Replacement Battery (H600-C409-A)

This 11.1V 2200mAh Li-ion battery replaces part number H600-C409-A in the Proscenic S1 cordless handheld vacuum. It fits the S1 platform directly, restoring motor voltage to specification. Capacity matches the original at 2200mAh (24.42Wh).

• S1 platform fit: The S1 series runs a single battery configuration across handheld and stick use. Voltage rail, connector pinout, and BMS handshake are consistent across S1 units, so one replacement covers both listed model variants.
• Bench tested on actual hardware: We cycled this cell through the S1 motor under load. The BMS held voltage above the cutoff floor under sustained suction draws, and overcurrent protection tripped correctly when airflow was restricted — then reset cleanly once the blockage cleared.
• Dock charging behaviour on the S1: Do not leave the S1 sitting on the charging dock indefinitely. Continuous trickle charging degrades Li-ion cell capacity faster than normal cycling. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the cell can sustain at the current state of charge. Voltage sags under load before the indicator registers a low-battery condition, so the vacuum feels like it's losing power while the LED still shows adequate charge. A partially blocked filter makes this worse — restricted airflow forces the motor to work harder, pulling higher current and amplifying the sag. Clean the filter first, then check whether the issue persists; if it does, the cell can no longer hold voltage under load and needs replacing.

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

This is a BMS overcurrent trip, not a dead battery. When airflow restriction spikes current draw beyond the BMS threshold — usually from a clogged filter or a blockage at the nozzle — the protection circuit opens and the motor stops. The BMS resets automatically once current drops, which is why power returns after a short pause. Clear the filter and check the nozzle path for debris before assuming the battery is at fault; a clean airway keeps current draw inside the BMS operating window.