{"product_id":"philips-freevents-15nb861105-replacement-battery-111v-4400mah-li-ion","title":"Philips Freevents 15NB8611\/05 Compatible Battery 11.1V SQU-805","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips Freevents 15NB8611 — 11.1V Li-ion Replacement Battery (SQU-805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the Philips Freevents 15NB8611 and 15NB8611\/05 notebook. It replaces OEM part numbers SQU-805, SQU-804, SQU-807, and several cross-referenced codes including 3UR18650-2-T0188 and 916C7830F. Fits directly into the standard battery bay with no modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFreevents 15NB8611 compatibility:\u003c\/strong\u003e\n    Both the \/05 variant and the base Freevents 15NB8611 use the same 11.1V three-cell voltage rail, identical connector pinout, and the same BMS handshake protocol — one cell covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on the Freevents 15NB8611 platform and confirmed the BMS recognised the pack, reported charge state correctly, and did not trip an overcharge cutoff during a full charge run to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install recalibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in most systems after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported capacity. When those values don't match, it flags the battery as degraded — even though the replacement cell is new. This is not a fault with the battery. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to run its learn cycle against the new cell's actual parameters and resets the health flag.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFreevents 15NB8611 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue. Under combined CPU and display load, the cell's output voltage drops faster than the fuel gauge IC tracks — the system hits the hardware undervoltage threshold before the percentage reaches zero. The OS gauge is reading a calibrated estimate, not live cell voltage. Run two full discharge-to-hibernate cycles to allow the fuel gauge IC to recalibrate against the new cell's actual discharge curve; the shutdowns typically stop once the gauge tracks below 3.3V per cell accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409822842970,"sku":"BWCS-FQU804NB-1","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409822875738,"sku":"BWCS-FQU804NB-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409822908506,"sku":"BWCS-FQU804NB-3","price":118.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/batteryweb.com\/products\/philips-freevents-15nb861105-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}