Villalin TP-AVC707 Replacement Battery 14.4V 2600mAh Li-ion

Villalin TP-AVC707 — 14.4V Li-ion Replacement Battery (4INR18650-4S)

This is a 14.4V 2600mAh lithium-ion battery pack built for the Villalin TP-AVC707 cordless stick vacuum. The four-cell configuration (4INR18650-4S) matches the voltage rail the vacuum's motor controller expects. Capacity is 37.44Wh as supplied.

• TP-AVC707 fitment: The TP-AVC707 motor controller draws directly from a 14.4V nominal Li-ion rail. Swapping to a mismatched voltage causes the BMS to trip on startup or the controller to refuse to spin the motor at all. This pack matches that rail exactly and carries the 4INR18650-4S cell arrangement the charger circuit expects.
• Bench tested on actual hardware: We ran this pack through repeated motor-start cycles, including simulated high-draw events under restricted airflow. The BMS held the over-current threshold without nuisance tripping, and cell balance across the four cells stayed within 20mV after a full charge-discharge cycle.
• Dock charging habit on the TP-AVC707: Do not leave the vacuum sitting on the charging dock when the battery is already full. Cordless vacuums left on continuous dock charge develop measurable capacity fade faster than units charged only when depleted. Charge to full, then remove the vacuum from the dock.

Cordless vacuum losing suction before the battery indicator reaches low

The TP-AVC707 motor draws significantly more current when airflow is restricted — a partially blocked filter or clogged brush roll can push draw well beyond rated current. The BMS reads this as a high-load condition and throttles output voltage to protect the cells, which the motor controller interprets as low battery. The suction loss you see is voltage sag, not actual capacity depletion. Clean the filter first, then retest — if suction restores with a clean filter, the battery is fine.

Motor cuts out mid-run then recovers after a short pause

This is a BMS overcurrent trip, not a failing battery. When the brush roll stalls or the filter blocks airflow sharply, current spikes above the BMS threshold and it shuts the output rail. After a few seconds the BMS resets and the motor restarts. The fix is to clear the blockage — check the filter, the brush roll, and the inlet port for debris. If cut-outs continue on a clear airflow path, measure pack voltage at rest: it should read between 15.6V and 16.8V on a freshly charged pack.