{"product_id":"xiaomi-redmi-book-14-replacement-battery-152v-3150mah-li-polymer","title":"Xiaomi Redmi Book 14 R14B01W Compatible Battery 15.2V 3150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Redmi Book 14 — 15.2V Li-Polymer Replacement Battery (R14B01W)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3150mAh (47.88Wh) lithium-polymer battery for the Xiaomi Redmi Book 14 laptop. It fits models XMA1901-AA and XMA1901-AG, along with the broader RedmiBook 14 lineup sharing the R14B01W part number. Swap it in when the original cell no longer holds a usable charge or fails to charge at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRedmiBook 14 compatibility:\u003c\/strong\u003e\n    The XMA1901-AA and XMA1901-AG variants share the same 15.2V four-cell configuration, connector pinout, and BMS handshake protocol. One cell fits all variants listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and load cycles on the RedmiBook 14 platform. The BMS completed handshake correctly, the fuel gauge IC registered capacity, and charge termination triggered at the expected voltage ceiling.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Redmi Book 14:\u003c\/strong\u003e\n    After installation, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell 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\"\u003eBIOS reporting poor battery health immediately after swapping the R14B01W\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Redmi Book 14 BIOS reads EEPROM data embedded in the battery's BMS chip to assess health. When a new cell arrives, that EEPROM starts at factory defaults, not at a calibrated state matched to your system. The BIOS interprets this as degraded or unknown status and flags it accordingly. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — the learn cycle rewrites the health baseline and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts off at 20–30% battery shown after replacing the cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a faulty cell. The fuel gauge IC maps state-of-charge percentages using data from the old, degraded cell — so its 25% does not match the new cell's actual voltage curve. Under combined CPU and display load, the new cell voltage drops faster than the stale fuel gauge map predicts, and the system hits the hardware cutoff before the gauge reaches zero. Two to three full discharge-and-charge calibration cycles correct the mapping. After the third cycle, shutdowns at falsely high percentages stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409607491674,"sku":"BWCS-XMR140NB-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409607524442,"sku":"BWCS-XMR140NB-2","price":120.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409607557210,"sku":"BWCS-XMR140NB-3","price":131.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XMR140NB-1.webp?v=1779580191","url":"https:\/\/batteryweb.com\/products\/xiaomi-redmi-book-14-replacement-battery-152v-3150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}