{"product_id":"266j9-laptop-battery-compatible-with-dell-inspiron-5490-replacement","title":"266J9 Laptop Battery Compatible with Dell Inspiron 5490 - Replacement","description":"\u003cp\u003eOur review of the 266J9 Laptop Battery finds it best suited for Dell users who need a straightforward, OEM-compatible replacement with clear safety certification. The battery replaces several Dell part numbers including 266J9, MV07R and others, and its main appeal is a direct fit and familiar 11.4V, 51Wh specification that matches the original smaller 3-cell packs found in many Inspiron and G series notebooks. This review focuses on real-world fit, advertised capacity, and the practical tradeoffs between the 51Wh 3-cell option and larger 68Wh 4-cell alternatives.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible part numbers:\u003c\/strong\u003e Covers multiple Dell part numbers so buyers can match the exact replacement and reduce the risk of ordering the wrong pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistry:\u003c\/strong\u003e Uses Li-ion chemistry for typical laptop performance and consistent voltage output under normal loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage and capacity:\u003c\/strong\u003e Provides 11.4V and a rated 51Wh (4255mAh) capacity, offering the same nominal power as many original 3-cell packs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e CE and FCC certification indicate the pack meets common safety and electromagnetic standards for consumer electronics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty support:\u003c\/strong\u003e Includes a 30 day refund window and 12 month replacement, which helps mitigate early failure concerns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement fit:\u003c\/strong\u003e Intended for Inspiron 5490 and selected G3\/G5 series models for an easy swap without modification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis replacement is ideal for owners of Dell Inspiron 5490, G3 3500\/3590 and G5 5500\/5505 series laptops who originally had the smaller 3-cell, 51Wh battery and need a like-for-like swap. It suits users who prioritize correct fit and validated part numbers over extending runtime with a larger pack.\u003c\/p\u003e\n\u003cp\u003ePeople who need maximum battery life or who have a laptop originally equipped with the 68Wh 4-cell MV07R option should look elsewhere; this 51Wh pack will not match the longer runtime of a 4-cell battery and customers should verify their original battery label before purchasing.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect compatibility with multiple Dell part numbers makes it easy to find the correct replacement.\u003c\/li\u003e\n\u003cli\u003eCE and FCC certification adds confidence on safety and regulatory compliance.\u003c\/li\u003e\n\u003cli\u003eWarranty and return window reduce risk if the pack fails early or is incompatible.\u003c\/li\u003e\n\u003cli\u003eCompact 3-cell design maintains the laptop's original weight and balance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report mixed battery life and occasional failure to hold charge, suggesting variable quality between units.\u003c\/li\u003e\n\u003cli\u003eLower 51Wh capacity will deliver less runtime than the alternative 68Wh 4-cell option available for some models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOUWEE\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\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e11.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e51Wh \/ 4255mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible part numbers\u003c\/td\u003e\n\u003ctd\u003e266J9, 0415CG, C9VNH, 0PN1VN, 0M4GWP, MV07R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement models\u003c\/td\u003e\n\u003ctd\u003eDell Inspiron 5490; G3 3500, 3590; G5 5500, 5505; various Inspiron 15 series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e30 day refund, 12 month replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 266J9 11.4V 51Wh replacement is a practical, cost-effective choice for users who need a like-for-like Dell battery swap and value safety certifications and warranty support. It is best when the original pack is a 3-cell 51Wh unit; those seeking longer runtime should confirm their laptop can accept the larger 68Wh option instead.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this battery fit my Inspiron 5490?\u003c\/strong\u003e\u003cbr\u003eIt will fit Inspiron 5490 and compatible models that originally used the 51Wh 3-cell battery; check your original battery label to confirm part number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long is the warranty?\u003c\/strong\u003e\u003cbr\u003eThe battery comes with a 30 day refund policy and a 12 month replacement warranty from the seller.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the higher capacity 68Wh option?\u003c\/strong\u003e\u003cbr\u003eNo, this pack is 51Wh; the 68Wh 4-cell option is a different battery and must be selected separately if your laptop originally used that pack.\u003c\/p\u003e","brand":"OUWEE","offers":[{"title":"Default Title","offer_id":48227023814875,"sku":"B083J4J22C","price":38.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/618yGWDq29L._AC_SL1500.jpg?v=1770660113","url":"https:\/\/gearmusthave.com\/products\/266j9-laptop-battery-compatible-with-dell-inspiron-5490-replacement","provider":"GearMustHave","version":"1.0","type":"link"}