{"product_id":"asus-zenbook-14-ux434fl-ai034r-replacement-battery-1155v-4200mah-li-polymer","title":"Asus ZenBook 14 UX434FL Compatible Battery C31N1841 11.55V 4200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenBook 14 UX434FL Series — 11.55V Li-Polymer Replacement Battery (C31N1841)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 11.55V, 4200mAh (48.51Wh) Li-Polymer replacement battery for the Asus ZenBook 14 UX434FL-AI034R and a wide range of UX434 and UX463 variants. It uses OEM part numbers C31N1841 and 0B200-03420200. The battery fits the slim chassis of the UX434 series without modification to connector, orientation, or cell thickness.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUX434 and UX463 platform compatibility:\u003c\/strong\u003e\n    These models share the same 3-cell Li-Polymer architecture, 11.55V voltage rail, and ZIF connector pinout. The BMS handshake protocol is identical across UX434FL, UX434FLC, and UX463FA variants, so one cell works across the full cluster.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on a UX434FL unit. The BMS accepted the cell without error codes, charge current stepped down correctly at the 4.2V-per-cell threshold, and the protection circuit tripped cleanly at the low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on battery only — no AC during discharge — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears 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\"\u003eWhy the ZenBook 14 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS fuel gauge IC maps voltage curves from the previous cell's EEPROM data. A new cell has different internal resistance and a slightly different discharge curve, so the gauge misreads the remaining capacity. Under full CPU and display load, the new cell hits a voltage cliff the old EEPROM data didn't predict, and the system cuts power before the indicator reaches zero. Running one full calibration cycle — discharge to hibernate, then a full uninterrupted charge — rewrites the gauge mapping to match the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"replace\" immediately after fitting\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is an EEPROM mismatch, not a fault with the new cell. The BIOS reads health data stored in the old cell's embedded controller and compares it against the new cell's reported Wh value — the figures don't match, so it flags a warning. The fix is a single battery learn cycle: boot into Windows, disconnect AC, let the laptop discharge fully to auto-hibernate, then plug in and charge to 100% without interruption. After one complete cycle, the BIOS recalibrates and the health warning clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409624891482,"sku":"BWCS-AUX434NB-1","price":102.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409624924250,"sku":"BWCS-AUX434NB-2","price":117.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409624957018,"sku":"BWCS-AUX434NB-3","price":128.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUX434NB-1.webp?v=1779580296","url":"https:\/\/batteryweb.com\/products\/asus-zenbook-14-ux434fl-ai034r-replacement-battery-1155v-4200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}