EZIclean Aqua Connect S200 14.4V Replacement Battery 3350mAh

EZIclean Aqua Connect S200 Series — 14.4V Li-ion Replacement Battery (INR18650-4S1P)

This 14.4V 3350mAh Li-ion battery pack replaces the original INR18650-4S1P cell in the EZIclean Aqua Connect cordless wet and dry vacuum range. It fits the S200, S250, X500, and X550 alongside eleven additional Aqua Connect models. Voltage and capacity match the factory spec exactly.

• Aqua Connect S200 / S250 / X500 / X550 platform: These models share the same 14.4V rail, INR18650-4S1P cell configuration, and BMS handshake protocol. A single cell pack covers the full range without any modification to the connector or charge circuit.
• Bench tested on actual hardware: We cycled this pack under load on the S200 motor assembly. The BMS held the discharge curve cleanly through carpet-load simulation and flagged overcurrent correctly on a blocked-filter draw spike — cutoff triggered at the expected threshold.
• Dock charging practice on the Aqua Connect range: Do not leave the vacuum sitting on the charging dock permanently. The Aqua Connect charger does not drop to a true maintenance rate once full — continuous dock contact pushes a low-level trickle that accelerates capacity fade on Li-ion cells. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low on the S200

The S200 motor draws significantly more current when the filter is partially blocked — airflow restriction forces the motor to work harder against back-pressure. This elevated draw causes voltage to sag earlier in the discharge cycle than the indicator expects. The indicator is calibrated for a clean, rated-draw discharge curve, so it lags behind the actual cell state under load. Check and clean the filter first; if sag persists with a clean filter, the cell itself has lost capacity and needs replacing.

Motor cuts out mid-clean, then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage or a heavily soiled filter, the motor draws beyond the BMS current threshold and the protection circuit opens. The pack resets once the draw drops — typically within a few seconds of releasing the trigger. Clear the blockage and inspect the filter before resuming. If the cutout keeps occurring on a clean filter, the pack's internal resistance has risen enough that normal motor-start current is breaching the trip point; at that stage, measure resting voltage — a healthy 14.4V pack should read between 15.8V and 16.8V off charge.