{"product_id":"asus-vivobook-s14-s433fa-eb095t-replacement-battery-1155v-4250mah-li-polymer","title":"Asus VivoBook S14 S433FA Replacement Battery 11.55V 4250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus VivoBook S14 S433FA Series — 11.55V Li-Polymer Replacement Battery (C31N1905)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V, 4250mAh (49.09Wh) lithium-polymer cell replaces part number C31N1905 in the Asus VivoBook S14 and S15 range. It fits the S433FA-EB095T, S433FA-EB173T, S433FL-EB107T, S533FL-BQ051T, and over 150 additional VivoBook variants sharing the same voltage rail and connector pinout. Install it when the original cell no longer holds charge or the laptop won't run unplugged.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVivoBook S14\/S15 platform fit:\u003c\/strong\u003e\n    All listed S433 and S533 models share the same 11.55V three-cell Li-Polymer architecture, identical 285.90 × 85.00 × 4.60mm footprint, and matching BMS handshake via the 0B200-03580200 connector assembly. One cell works across the entire bracket.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on an S433FA unit and confirmed the BMS completed its charge handshake, held steady at 11.55V nominal under display-plus-CPU load, and triggered the low-voltage cutoff cleanly without tripping a false over-discharge fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install recalibration on VivoBook firmware:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff — do not force shutdown — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware throws after every 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 replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe VivoBook BIOS reads health data stored in the old cell's EEPROM, not from the new cell's actual charge state. When a fresh cell is installed, that EEPROM data is absent or mismatched, so the firmware flags the battery as degraded or unknown. This is not a fault with the replacement cell. Run one complete discharge-to-hibernate cycle followed by an uninterrupted full charge — after two to three cycles, the BIOS recalibrates against the new cell and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still referencing capacity curves from the old, degraded cell. When the new cell hits its actual low-voltage threshold under combined CPU and display load, the firmware has already miscalculated how much charge remains. The result is a sudden shutdown well above the reported zero-percent mark. Discharge the laptop fully to hibernate, charge to 100% without interruption, and repeat twice — the fuel gauge IC recalibrates its curve and the reported percentage will align with actual cell voltage, typically settling at 3.85V per cell at the 50% mark.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409615355994,"sku":"BWCS-AUM433NB-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409615388762,"sku":"BWCS-AUM433NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409615421530,"sku":"BWCS-AUM433NB-3","price":111.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUM433NB-1.webp?v=1779580214","url":"https:\/\/batteryweb.com\/products\/asus-vivobook-s14-s433fa-eb095t-replacement-battery-1155v-4250mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}