{"product_id":"asus-chromebook-c436fa-replacement-battery-1155v-3600mah-li-polymer","title":"Asus Chromebook C436FA Compatible Battery C31N1845 11.55V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Chromebook C436FA — 11.55V Li-Polymer Replacement Battery (C31N1845)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 3600mAh (41.58Wh) Li-Polymer battery for the Asus Chromebook C436FA. It replaces OEM part numbers C31N1845 and 0B200-03570000. Fit this when the original cell no longer holds charge or the system reports degraded battery health.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC436FA platform fit:\u003c\/strong\u003e\n    The C436FA uses a three-cell Li-Polymer pack on an 11.55V rail with a dedicated fuel gauge IC. Any replacement must match that voltage and cell count — a mismatch trips the BMS and blocks charging entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a C436FA unit and confirmed full charge acceptance to 100%, stable BMS handshake, and no cutoff errors during a CPU-plus-display load cycle. The EEPROM handshake completed cleanly on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the C436FA:\u003c\/strong\u003e\n    After fitting, run the Chromebook down to the automatic hibernate cutoff — do not force shutdown — then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this model.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the C436FA shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the C436FA maps voltage curves from the old cell. When a new cell is installed, those stored curves no longer match the actual discharge slope of the fresh chemistry. The system reads a rapid voltage drop under CPU-plus-display load and interprets it as a near-empty cell, triggering shutdown well before the real cutoff. Running two full discharge-to-hibernate and charge-to-100% cycles recalibrates the fuel gauge IC against the new cell's actual voltage curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor or unknown immediately after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C436FA's BIOS pulls health data from EEPROM registers that were written by the original cell during its service life. A replacement cell ships with fresh EEPROM data, which the BIOS flags as a mismatch — showing \"poor health\" or \"0%\" on first boot. This is not a fault with the cell. Boot into the Chromebook's battery settings after completing a full learn cycle — charge to 100% uninterrupted — and the health status corrects itself as the BIOS overwrites the stale EEPROM values.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409617616986,"sku":"BWCS-AUC463NB-1","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409617649754,"sku":"BWCS-AUC463NB-2","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409617682522,"sku":"BWCS-AUC463NB-3","price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC463NB-1.webp?v=1779580214","url":"https:\/\/batteryweb.com\/products\/asus-chromebook-c436fa-replacement-battery-1155v-3600mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}