Tineco iFloor S5 21.6V Replacement Battery CL2019-6S1P-02A

Tineco iFloor S5 FW160100CN — 21.6V Li-ion Replacement Battery (CL2019-6S1P-02A)

This is a 21.6V 4000mAh Li-ion replacement battery for the Tineco iFloor S5 FW160100CN cordless wet-dry floor cleaner. It matches the OEM part number CL2019-6S1P-02A and fits the FW160100CN variant specifically. Capacity is rated at 86.4Wh, matching the original pack specification.

• iFloor S5 FW160100CN fit: The FW160100CN uses a 6S1P cell configuration running a 21.6V nominal rail. The BMS in this vacuum communicates with the charger to confirm pack identity — a mismatched BMS handshake will cause the charger LED to reject the pack outright, so cell count and communication protocol both matter here.
• Bench tested on actual hardware: We ran this pack through charge cycles on the iFloor S5 platform and confirmed the BMS negotiated correctly with the OEM charger. Suction motor start-up draw did not trigger an overcurrent cutoff, and the charge indicator cycled through all four LEDs as expected.
• Dock charging habit on the iFloor S5: The iFloor S5 is frequently left on its wall dock between uses. The charger does not cut trickle current once the pack is full — leaving it docked continuously accelerates capacity fade in Li-ion cells. Charge to full, then remove the unit from the dock until the next cleaning session.

Suction dropping well before the battery indicator reaches low

The iFloor S5 runs both a suction motor and a brush roller from the same 21.6V pack. When the dirty-water filter or the pre-motor filter is partially blocked, the motor works harder to maintain airflow and draws above its rated current. The BMS interprets the elevated draw as voltage sag and begins throttling power before the fuel gauge registers low. Cleaning both filters before each session keeps motor draw within the pack's rated output range and prevents premature power reduction.

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

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked brush roll, clogged filter, or sustained use on thick wet debris — current spikes past the BMS cutoff threshold and the pack disconnects the motor circuit. The BMS resets automatically once current drops, which is why the vacuum restarts after a brief pause. Clear the brush roll and check the self-cleaning filter for saturation before the next run; if the filter is wet, the restriction is immediate and the trip will repeat.