{"product_id":"c21n1818-1-battery-for-asus-vivobook-15-replacement-7-7v-32wh","title":"C21N1818-1 Battery for ASUS VivoBook 15 - Replacement 7.7V 32Wh","description":"\u003cp\u003eIn this review the C21N1818-1 replacement battery is assessed for owners of various Asus VivoBook 15 and X512 series laptops who need a direct-fit, cost-effective swap for a failing original cell. The reviewer found the unit to be a straightforward replacement that matches the original specification of \u003cstrong\u003e7.7V\u003c\/strong\u003e and \u003cstrong\u003e32Wh\u003c\/strong\u003e, and praised its simple installation and compatibility across many F512, X512, R564, S512 and K512 models. The main reason to buy is compatibility and value for money when a worn battery needs replacing rather than a full laptop repair.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact voltage match:\u003c\/strong\u003e The 7.7V rating ensures the battery works with systems expecting the original voltage without firmware mismatch issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory-new cells:\u003c\/strong\u003e The unit is described as brand new with high quality materials and top circuit boards for stable daily use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart chip protection:\u003c\/strong\u003e Built-in smart chip and circuitry help manage charging and protect against common battery faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide model compatibility:\u003c\/strong\u003e Advertised compatibility covers many VivoBook 15 and X512 series variants, reducing the risk of ordering the wrong spare part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplace part number:\u003c\/strong\u003e Matches C21N1818-1 and related part numbers so it can be identified against service documentation and original labels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter-sales support:\u003c\/strong\u003e The seller provides a 12 month warranty, 30 day returns and email support for questions during installation and early use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis replacement battery is best for owners of Asus VivoBook 15 F512, X512 and related models who need a direct swap to restore portable runtime without paying dealer service prices. It suits DIY hobbyists comfortable opening the chassis to replace a user-serviceable battery and those who value clear part-number matching like C21N1818-1.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include people who want a higher-capacity upgrade or long-term heavy users who need extended runtime beyond the original specification; this unit is a like-for-like replacement rather than a performance upgrade.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood fit and ease of installation on supported VivoBook models as reported by multiple users.\u003c\/li\u003e\n\u003cli\u003eSpecification-matching voltage and capacity for safe replacement of worn originals.\u003c\/li\u003e\n\u003cli\u003eBrand new cells with smart chip and protective circuit boards for reliable charging behavior.\u003c\/li\u003e\n\u003cli\u003eSeller support includes a 12 month warranty and a 30 day return window for early issues.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users reported mixed battery life longevity, with a minority experiencing premature failure after a few months.\u003c\/li\u003e\n\u003cli\u003eNot a higher-capacity upgrade; it replaces original runtime rather than extending it significantly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e7.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e32Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003eLi-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplace Part Number\u003c\/td\u003e\n\u003ctd\u003eC21N1818-1, 0B200-03280800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eBrand new, with top circuit boards and smart chip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Models\u003c\/td\u003e\n\u003ctd\u003eVivoBook 15 F512, X512, R564, S512, K512 series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe C21N1818-1 replacement battery is a practical, like-for-like option for VivoBook 15 owners who need to restore original battery performance without spending on full service. It delivers correct voltage and original-style capacity, fits a wide range of F512 and X512 variants, and comes with reasonable warranty support. For users seeking exact compatibility and value, it is a sensible choice; those seeking longer runtime should consider higher-capacity alternatives.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this battery fit my VivoBook 15?\u003c\/strong\u003e\u003cbr\u003eIt is listed as compatible with many F512, X512, R564, S512 and K512 series models; verify your original part number matches C21N1818-1 or the listed replacements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the battery capacity and voltage?\u003c\/strong\u003e\u003cbr\u003eThe replacement is specified at 7.7V and 32Wh and uses Li-ion cells with a protective smart chip.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty and support are provided?\u003c\/strong\u003e\u003cbr\u003eThe seller offers 12 months warranty, 30 day returns and 24x7 email support for installation or early failure questions.\u003c\/p\u003e","brand":"ANTIEE","offers":[{"title":"Default Title","offer_id":48240117907675,"sku":"B09L4RHQ4L","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71xHH2gWDnL._AC_SL1500.jpg?v=1771080908","url":"https:\/\/gearmusthave.com\/products\/c21n1818-1-battery-for-asus-vivobook-15-replacement-7-7v-32wh","provider":"GearMustHave","version":"1.0","type":"link"}