{"product_id":"electrolux-pure-f9-replacement-battery-36v-2000mah-li-ion","title":"Electrolux Pure F9 Replacement Battery 36V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eElectrolux Pure F9 \/ FlexLift PF9 Series — 36V Li-ion Replacement Battery (140144439084)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 36V 2000mAh (72Wh) Li-ion battery replaces the original power pack in the Electrolux Pure F9 and FlexLift PF9 series cordless stick vacuums. It fits the PF91-6BWF and the broader Pure F9 FlexLift range. The OEM part number 140144439084 is the primary reference for this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePure F9 and FlexLift PF9 platform fit:\u003c\/strong\u003e\n    These models share the same 36V bus, connector housing, and BMS handshake protocol. The battery slides into the same locking bay and communicates charge state to the vacuum's power management board without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the F9 charge cycle and confirmed the BMS handshake with the dock. The protection circuit responded correctly to overcurrent conditions — cutting out and resetting cleanly — and the charge indicator updated as expected throughout the cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging discipline on the F9:\u003c\/strong\u003e\n    Do not leave the F9 sitting on the charging dock indefinitely between uses. Continuous trickle charge through the dock accelerates capacity fade in Li-ion cells at this voltage. Charge to full, then remove the vacuum from the dock until the next use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSuction dropping before the battery indicator reaches low\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe F9's motor draws harder when airflow is restricted — a blocked filter or partial blockage raises current draw, which triggers early voltage sag at the battery terminals even when the cell still holds charge. The vacuum's power board reads this sag as low voltage and steps the motor back before the indicator reflects actual state of charge. Clean or replace the filter first. If suction recovers at lower power settings with a clean filter, the issue is airflow restriction, not battery capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cuts out mid-use then restarts after a short pause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a cell failure. When the F9 motor sustains a high-draw condition — dense carpet, a partial clog, or heavy debris — current briefly spikes past the BMS threshold and the protection circuit opens. The pack cools and resets within seconds, and the vacuum restarts normally. If the cutout repeats within the same cleaning session, check that the filter is clear and that no blockage is restricting the suction path. A clean, unobstructed airway keeps motor current within the BMS's rated operating window.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43427975266394,"sku":"BWCS-AEF914VX-1","price":82.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43427975299162,"sku":"BWCS-AEF914VX-2","price":96.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43427975331930,"sku":"BWCS-AEF914VX-3","price":107.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AEF914VX-1.webp?v=1779933648","url":"https:\/\/batteryweb.com\/products\/electrolux-pure-f9-replacement-battery-36v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}