360 S6 Pro Cordless Vacuum Replacement Battery 14.4V 6700mAh

360 S6 Pro / S9 / X90 / X95 — 14.4V Li-ion Replacement Battery (D080-4S2P)

This is a 14.4V, 6700mAh lithium-ion battery pack for the 360 S6 Pro, S9, X90, and X95 cordless stick vacuums. It replaces OEM part numbers D080-4S2P and INR18650 M26-4S2P. Capacity is 96.48Wh — matching the original specification for full motor output.

• S6 Pro, S9, X90, and X95 compatibility: These four models share the same 14.4V battery rail, physical connector, and BMS handshake protocol. The pack slots directly into any of them without modification or adapter.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the S6 Pro platform. The BMS reported correct cell voltage, accepted the charger handshake, and the motor spun up to full speed without triggering overcurrent cutoff.
• Dock charging habit on the S6 Pro and X-series: Do not leave the vacuum sitting on the charging dock permanently. Continuous trickle charging accelerates capacity fade in these packs faster than normal cycle wear. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the BMS's continuous discharge threshold allows under load — not because the battery is depleted. A partially blocked filter or brush roll forces the motor to pull harder, causing voltage sag at the cell level. The BMS reads the sag as a low-cell condition and throttles output to protect the pack. Clean the filter and clear the brush roll before concluding the battery is at fault.

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

This is a BMS overcurrent trip, not a failing battery. When suction is restricted — blocked filter, clogged hose, or dense carpet — the motor draws a sustained current spike above the pack's rated continuous output. The BMS cuts the circuit to protect the cells, then resets once temperature and current normalise. Check the filter first: a filter that reads visually clean can still be restricting airflow enough to trigger the trip. Replace the filter if the cutout persists after clearing all blockages.