{"product_id":"hp-chromebook-14b-replacement-battery-1155v-4750mah-li-polymer","title":"HP Chromebook 14B HSTNN-IB9S Replacement Battery 11.55V 4750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Chromebook 14B \/ X360 14C Series — 11.55V Li-Polymer Replacement Battery (HSTNN-IB9S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 11.55V, 4750mAh (54.86Wh) Li-Polymer replacement battery for the HP Chromebook 14B and Chromebook X360 14C series. It fits the X360 14C-CC0013DX and X360 14C-CD0000CA alongside the standard 14B chassis. OEM part numbers include HSTNN-IB9S, HSTNN-OB1V, SI03XL, SI03058XL, M12329-1D1, and M12329-AC1.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e14B and X360 14C platform fit:\u003c\/strong\u003e\n    Both the 14B and X360 14C lines run the same voltage rail and use the same three-cell SI03 connector pinout with a shared BMS handshake. That common architecture is why one cell covers both chassis variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a 14C unit. The BMS accepted the cell, reported state-of-charge correctly after two calibration cycles, and did not trigger a low-voltage cutoff prematurely under combined CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ChromeOS:\u003c\/strong\u003e\n    After fitting, let the battery discharge fully until the Chromebook hibernates, then charge uninterrupted to 100% without interruption. ChromeOS uses that full cycle to recalibrate the fuel gauge IC against the new cell — skipping it leaves the charge percentage reading unreliable for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy ChromeOS reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EC firmware on the 14B and X360 14C stores learned battery data — full charge capacity, cycle count, wear level — in EEPROM on the old cell. When a new cell is installed, that EEPROM data is gone, and ChromeOS reads the blank state as degraded or unknown health. This is not a fault with the replacement cell. Running one complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and clears the warning. After two to three full cycles the health indicator should stabilise at normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eChromebook shuts down abruptly while the battery gauge still shows 20–25%\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet mapped the new cell's actual voltage curve. Under combined CPU, display backlight, and Wi-Fi load, the cell voltage drops faster than the uncalibrated gauge expects — the BMS sees the voltage floor and cuts power before the displayed percentage reaches zero. It looks like sudden shutdown but the root cause is a mismatched discharge curve in the gauge's model. The fix is the same calibration cycle: discharge to hibernate cutoff, then charge straight to 100%. After that full reference cycle the gauge adjusts its model 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":43409610408026,"sku":"BWCS-HPC142NB-1","price":102.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409610440794,"sku":"BWCS-HPC142NB-2","price":117.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409610473562,"sku":"BWCS-HPC142NB-3","price":128.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPC142NB-1.webp?v=1779580172","url":"https:\/\/batteryweb.com\/products\/hp-chromebook-14b-replacement-battery-1155v-4750mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}