{"product_id":"lenovo-thinkpad-x1-carbon-14-replacement-battery-148v-3000mah-li-polymer","title":"Lenovo ThinkPad X1 Carbon 14 45N1701 Compatible Battery 14.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad X1 Carbon 14 — 14.8V Li-Polymer Replacement Battery (45N1701)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 3000mAh (44.4Wh) Li-Polymer cell for the Lenovo ThinkPad X1 Carbon 14 ultrabook. It fits the 20A7 and 20A8 chassis variants, along with the X1 Carbon 4th generation and related models. OEM part numbers covered include 45N1701, 45N1702, 45N1703, 00HW002, 00HW003, and SB10F46440.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX1 Carbon 14 \/ 20A7 \/ 20A8 platform fit:\u003c\/strong\u003e\n    These chassis share a 14.8V nominal rail, the same slim 5.34mm pack profile, and identical BMS handshake protocol — which is why one cell covers all three variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a ThinkPad X1 Carbon 20A8 and monitored the BMS through charge and load. The protection circuit held voltage within spec under sustained CPU and display load, and the pack accepted a full charge without triggering thermal cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ThinkPad X1 Carbon:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad BIOS stores battery state data in an EEPROM register tied to the old cell. When a new pack is installed, the BIOS reads stale cycle counts and Wh data, then flags the battery as degraded before it has run a single cycle. This is not a fault with the replacement cell — it is a data mismatch. Run the battery learn cycle in Lenovo Vantage under Power settings, or complete one full manual discharge-to-hibernate followed by an uninterrupted charge to 100%. After one to two full cycles, the BIOS recalibrates and the health warning clears.\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 when the fuel gauge IC has not yet mapped its discharge curve against the new cell's actual voltage profile. Under full CPU plus display load, the cell voltage drops faster than the old calibration predicts, and the system hits its low-voltage cutoff while the gauge still shows 20–30% remaining. The fix is calibration, not a swap — discharge fully to hibernate, then charge to 100% without interruption. After two to three cycles, the fuel gauge IC recalibrates to the new cell and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409772773466,"sku":"BWCS-LVX114NB-1","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409772806234,"sku":"BWCS-LVX114NB-2","price":133.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409772839002,"sku":"BWCS-LVX114NB-3","price":146.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVX114NB-1.webp?v=1779580789","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-x1-carbon-14-replacement-battery-148v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}