{"product_id":"asus-q302l-replacement-battery-113v-4000mah-li-polymer","title":"Asus Q302L Replacement Battery 11.3V 4000mAh C31N1339","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Q302L Series — 11.3V Li-Polymer Replacement Battery (C31N1339)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.3V, 4000mAh (45.2Wh) Li-Polymer replacement battery for the Asus Q302L, Q302LA, Q302LG, and Q302LA-BBI5T14 notebook laptops. It replaces OEM part numbers C31N1339, 0B200-00930100, 0B200-00930200, and 0B200-00930300. If the original cell has degraded and the laptop no longer holds a charge unplugged, this cell restores portable operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQ302 series platform fit:\u003c\/strong\u003e\n    The Q302LA, Q302LG, and Q302LA-BBI5T14 all share the same three-cell Li-Polymer pack configuration, matching connector pinout, and BMS handshake protocol — which is why a single part number covers the entire range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on the Q302L platform and confirmed the BMS negotiation completes correctly — the system identifies the battery, charge current ramps as expected, and the protection circuit trips at the correct cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap recalibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff under normal use, 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 replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Q302L BIOS stores battery health data in EEPROM on the old cell. When a new cell goes in, the BIOS reads stale cycle count and degradation values from its own memory and flags the battery as poor before a single cycle has run. This is a firmware read issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a full uninterrupted charge forces the BIOS to rewrite that EEPROM data against the actual new cell. After one complete learn cycle, the health status updates and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting 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 calibrated against the new cell's actual voltage curve. The IC maps a legacy discharge curve to the new cell and calls the voltage floor too early — cutting power while the display still shows charge remaining. It is not a dead cell. Run two to three full discharge-to-hibernate cycles with no interruptions and the fuel gauge recalibrates its low-voltage threshold to match the actual chemistry. After calibration, the shutdown point shifts back to the correct cutoff near 10.0V per pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410737365082,"sku":"BWCS-AUQ302NB-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410737397850,"sku":"BWCS-AUQ302NB-2","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410737430618,"sku":"BWCS-AUQ302NB-3","price":130.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUQ302NB-1.webp?v=1779580772","url":"https:\/\/batteryweb.com\/products\/asus-q302l-replacement-battery-113v-4000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}