{"product_id":"b21n1818-3-battery-for-asus-fl8700-y4200f-vivobook-14","title":"B21N1818-3 Laptop Battery For Asus FL8700 Y4200F VivoBook 14 Series 7.7V 37WH | KingSener","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eB21N1818-3\u003c\/strong\u003e replacement battery is organized from the listed product data. Key details include \u003cstrong\u003eVoltage: 7.7V\u003c\/strong\u003e, \u003cstrong\u003eCapacity: 37WH\/4850mAh (High Capacity)\u003c\/strong\u003e, \u003cstrong\u003eBattery Type: Premium Li-ion\u003c\/strong\u003e. Compatibility includes \u003cstrong\u003eVivoBook 14 Series: X409, X409F, X409FUA, X409FB, X509, X545\u003c\/strong\u003e and \u003cstrong\u003eY Series: Y4200F, Y4200FB, Y5200F, Y5200FB\u003c\/strong\u003e and additional models below.\u003c\/p\u003e\u003ch2\u003eSpecs\u003c\/h2\u003e\u003ctable style=\"border-collapse:collapse;width:100%;border:1px solid #5b6770\"\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eBattery Model\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003eB21N1818-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eVoltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003e7.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eCapacity\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003e37WH\/4850mAh (High Capacity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eBattery Type\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003ePremium Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eColor\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eCondition\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003eBrand New (100% New, 1-year warranty)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #5b6770;padding:8px;background:#eef2f4;text-align:left\"\u003eCertification\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #5b6770;padding:8px\"\u003eCE, FCC, RoHS compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eParts\u003c\/h2\u003e\u003cul style=\"columns:2 220px;column-gap:28px;margin:12px 0;padding-left:24px\"\u003e\n\u003cli style=\"break-inside:avoid;margin-bottom:4px\"\u003eB21N1818-3\u003c\/li\u003e\n\u003cli style=\"break-inside:avoid;margin-bottom:4px\"\u003eB21N1818-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModels\u003c\/h2\u003e\u003cul style=\"columns:2 220px;column-gap:28px;margin:12px 0;padding-left:24px\"\u003e\n\u003cli style=\"break-inside:avoid;margin-bottom:4px\"\u003eVivoBook 14 Series: X409, X409F, X409FUA, X409FB, X509, X545\u003c\/li\u003e\n\u003cli style=\"break-inside:avoid;margin-bottom:4px\"\u003eY Series: Y4200F, Y4200FB, Y5200F, Y5200FB\u003c\/li\u003e\n\u003cli style=\"break-inside:avoid;margin-bottom:4px\"\u003eFL8700 Series: FL8700, FL8700D, FL8700F\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhich battery references should I compare with the original pack?\u003c\/h3\u003e\u003cp\u003eThe listed battery model is B21N1818-3. Other replacement references include B21N1818-3, B21N1818-1; compare the label on the original battery before ordering.\u003c\/p\u003e\u003ch3\u003eWhat electrical specifications does this replacement battery use?\u003c\/h3\u003e\u003cp\u003eThe listed voltage is 7.7V, capacity is 37WH\/4850mAh (High Capacity), and battery type is Premium Li-ion. These values should match the original battery requirements.\u003c\/p\u003e\u003ch3\u003eWhich device models are listed as compatible?\u003c\/h3\u003e\u003cp\u003eThe product is listed for VivoBook 14 Series: X409, X409F, X409FUA, X409FB, X509, X545; Y Series: Y4200F, Y4200FB, Y5200F, Y5200FB. Check the exact device series, battery model and connector position rather than relying only on the brand name.\u003c\/p\u003e\u003ch3\u003eWhat should I check before replacing the battery?\u003c\/h3\u003e\u003cp\u003eCompare the original model number, voltage, capacity, connector and physical fit with the listed specifications. If any key detail differs, confirm compatibility before installation.\u003c\/p\u003e","brand":"ASUS","offers":[{"title":"Type A","offer_id":42947221881004,"sku":"C21N1818-1-7.6V-32Wh-Buc\u0026Multi-OEM","price":43374.0,"currency_code":"KRW","in_stock":true},{"title":"Type D","offer_id":42947221913772,"sku":"B21N1818-4-7.6V-32Wh-Buc\u0026Multi\u0026Left-OEM","price":43374.0,"currency_code":"KRW","in_stock":true},{"title":"Type B","offer_id":42947221946540,"sku":"B21N1818-2-7.6V-32Wh-Below\u00262Screw-OEM","price":43374.0,"currency_code":"KRW","in_stock":true},{"title":"Type C","offer_id":42947221979308,"sku":"B21N1818-3-7.7V-37WH-Below\u00263Screw-OEM","price":43374.0,"currency_code":"KRW","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0429\/2047\/6834\/files\/ASUS-B21N1818-3-7.6V-37Wh-Laptop-Battery.jpg?v=1772763334","url":"https:\/\/bitterymill.com\/ko-kr\/products\/b21n1818-3-battery-for-asus-fl8700-y4200f-vivobook-14","provider":"BatteryMall.com","version":"1.0","type":"link"}