{"product_id":"electrolux-pure-f9-replacement-battery-36v-3000mah-li-ion","title":"Electrolux Pure F9 Replacement Battery 36V 3000mAh","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 is a 36V, 3000mAh (108Wh) lithium-ion replacement battery for the Electrolux Pure F9 and FlexLift PF9 series cordless stick vacuums. It fits the PF91-6BWF and the broader Pure F9 FlexLift range. It slots into the same battery bay as the original and connects to the same charging circuit.\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 battery bay, connector pinout, and BMS communication protocol. The OEM part numbers 140144439084 and 56646710099 cover the full range, so one cell covers the entire F9 family without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through charge and discharge cycles on a Pure F9 unit. The BMS handshake completed correctly, the charger recognised the cell without fault codes, and the motor draw stayed within BMS trip thresholds across all suction modes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging practice on the Pure F9:\u003c\/strong\u003e\n    The Pure F9 charging dock does not cut power automatically when the battery reaches full. Leaving the vacuum docked continuously exposes the lithium cells to sustained trickle current. Charge to full, then remove the vacuum from the dock to protect cell capacity over time.\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\"\u003eThis is a voltage sag issue, not a capacity issue. When the filter is partially blocked or airflow is restricted, the motor draws above its rated current. The BMS reads the resulting voltage sag as a low-battery condition and reduces power output to protect the cells. The battery indicator can still show two or three bars while suction falls noticeably. Check and clean the filter first — if sag continues on a clean filter, the cell itself may have degraded below 32V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cuts out mid-clean and recovers after a short pause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a dead battery. The BMS shuts the output when sustained high current — typically from a blocked filter or partial blockage in the brush head — exceeds the trip threshold. After a short pause the BMS resets and power returns. The trip is a protection event, not a fault in the replacement cell. Clear the blockage or filter restriction and the trip stops. If the motor still trips on a clear filter, check that the brush head roll is not jammed, as a seized roll drives the same overcurrent condition.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43427974971482,"sku":"BWCS-AEF915VX-1","price":108.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43427975004250,"sku":"BWCS-AEF915VX-2","price":128.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43427975037018,"sku":"BWCS-AEF915VX-3","price":142.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AEF915VX-1.webp?v=1779933519","url":"https:\/\/batteryweb.com\/products\/electrolux-pure-f9-replacement-battery-36v-3000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}