Xiaomi Mijia WXCDJ01SWDK 11.1V Replacement Battery INR14430-3S1P

Xiaomi Mijia WXCDJ01SWDK — 11.1V Li-ion Replacement Battery (INR14430-3S1P)

This is an 11.1V, 650mAh Li-ion replacement battery for the Xiaomi Mijia WXCDJ01SWDK handheld cordless vacuum cleaner. It matches the OEM part number INR14430-3S1P and restores full motor voltage to units where the original cell has degraded or failed. Dimensions are 46.00 × 43.00 × 15.20mm — confirm these against your existing pack before ordering.

• WXCDJ01SWDK motor voltage rail: The WXCDJ01SWDK motor runs directly off the 11.1V nominal cell string. A three-cell series configuration (3S1P) is what maintains adequate voltage at the motor under suction load. A degraded cell drops the string voltage early, which is why suction collapses well before the indicator reaches low.
• Bench tested on actual hardware: We cycled this pack through sustained motor-load draws and confirmed the BMS holds cutoff voltage without tripping prematurely under normal suction resistance. Cell balance across the 3S string stayed within tolerance through multiple discharge cycles.
• Dock charging practice for WXCDJ01SWDK: Do not leave this vacuum on the charging dock permanently. Continuous trickle charging on a 3S Li-ion pack accelerates capacity fade faster than normal cycling. Charge to full, then remove from the dock until the next use.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when one or more cells in the 3S string have degraded and can no longer sustain voltage under load. The BMS reads pack voltage, not individual cell capacity — so the indicator stays green while actual motor voltage sags under suction draw. The motor throttles down because it is not getting its full 11.1V, and suction drops noticeably. Replacing the pack restores the full voltage rail and eliminates the early sag.

Motor cuts out mid-use and then recovers after a short pause

This is a BMS overcurrent trip, not a failed motor. When suction is restricted — typically by a clogged filter or blocked nozzle — the motor draws harder to maintain airflow, pulling current above the BMS threshold. The BMS cuts the circuit to protect the cells, then resets once current demand drops. Clean or replace the filter first. If the cutout continues with a clean filter and a fresh battery, check the nozzle path for a partial blockage causing sustained high draw.