{"product_id":"genuine-b31n1424-battery-replacement-for-asus-a401lb-k401lb-k401ub-k401uq-r415ub-r415uq-laptop","title":"B31N1424 Battery Replacement for Asus A401LB K401LB K401UB K401UQ R415UB R415UQ Laptop","description":"\u003ch2\u003e\u003cspan\u003eGenuine B31N1424 vs. Generic: How to Choose the Right Replacement Battery for Your ASUS A401 \/ K401 \/ R415 Series\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eIf you have an ASUS A401LB, K401LB, K401UB, K401UQ, R415UB, or R415UQ, you know these laptops are durable. Sleek, reliable, and perfect for daily productivity, streaming, or light creative work. When the original battery fades, the reliable laptop turns into a desk-bound machine. It’s always searching for an outlet.\u003c\/p\u003e\n\u003cp\u003eWhen it’s time to replace the B31N1424 battery, you have three choices: pay ASUS’s OEM price, gamble on a cheap generic, or look for a genuine-spec replacement. The last choice gives you the same performance without the high cost.\u003c\/p\u003e\n\u003cp\u003eThis guide explains the B31N1424 battery for ASUS A401, K401, and R415 series. It highlights the battery's special features. It shows how to find a reliable replacement. Plus, it suggests ways to keep your ASUS running well.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eWhat Exactly Is the ASUS B31N1424 Battery?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eB31N1424\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the factory‑spec lithium‑ion battery designed for the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e laptops. It’s a slim, high‑density internal pack that balances portability with enough runtime to get through a day of classes, meetings, or entertainment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eValue\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel \/ Part Number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eB31N1424\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCompatible Models\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eASUS A401LB, K401LB, K401UB, K401UQ, R415UB, R415UQ\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eReplaces Part Number :\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0B200-01390000, B31N1424\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCompatible Laptop Models:\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eA401LB, A401UB, A401UQ, A401UQ-FA123T, K401LB, K401LB-1A, K401LB-FA003H, K401LB-FA007H, K401LB-FA012D, K401LB-FA013D, K401LB-FA013H, K401LB-FA021H, K401LB-FA036H, K401LB-FR026T, K401LB-FR036H, K401LB-FR042H, K401LB-FR046T, K401LB-FR052D, K401LB-FR053D, K401LB-FR054H, K401LB-FR068D, K401LB-FR068T, K401LB-FR084D, K401LB-FR119D, K401LB-WS71, K401LB5010, K401LB5200, K401LB5500, K401U, K401UB, K401UB-2A, K401UB-FR004T, K401UB-FR006T,\u003cbr\u003eK401UB-FR008D, K401UB-FR009D, K401UB-FR016T, K401UB-FR028D,\u003cbr\u003eK401UB-FR038T, K401UB-FR049D, K401UQ, K401UQ-2A, K401UQ-7200U,\u003cbr\u003eK401UQ-FA074T, K401UQ-FA075T, K401UQ-FA079T, K401UQ-FA085T, K401UQ-FA090D, K401UQ-FA096T, K401UQ-FA098T, K401UQ-FA115D, K401UQ-FA120D, K401UQ-FA126T, K401UQ-FA141T, K401UQ-FA177D, K401UQ-FA183T, K401UQ-FR007D,\u003cbr\u003eK401UQ-FR008D, K401UQ-FR047T, K401UQK, R415LB, R415UB, R415UB-FR027T, R415UB-FR042T, R415UQ, R415UQ-FA108T, R415UQ-FA109T, R415UQ-FR014T, V401LB, V401UB, V401UQ, V405LB, V405UB, V405UQ\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTypical Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e48–56 WHr (watt‑hours, depends on configuration)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eChemistry\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLithium‑ion (high‑density cells)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVoltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e11.4 V nominal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSafety Features\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOver‑charge, over‑discharge, short‑circuit protection, temperature monitoring\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eA healthy B31N1424 battery means your ASUS actually delivers the all‑day portability it was designed for—not a laptop that dies before lunch.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eGenuine‑Spec vs. OEM vs. Generic: What’s Actually Different?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eNot every battery that “fits” your ASUS behaves the same. Here’s what separates a reliable replacement from one that will leave you frustrated.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eFactor\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eGenuine‑Spec Replacement (B31N1424)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eOEM (ASUS Original)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eTypical Generic \/ No‑Name\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eCell Quality\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOEM‑matched cells (LG \/ Samsung \/ Murata grade)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOriginal manufacturer cells\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUnknown or lower‑grade cells; capacity often overstated\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eCapacity\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTrue original capacity (48–56Wh)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOEM spec\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOften under‑rated; actual may be 20–30% less\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eProtection Circuit\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFull PCM with over‑voltage, under‑voltage, short‑circuit, temperature protection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFull protection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMinimal or missing protection; higher risk of swelling or failure\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eBIOS \/ EC Communication\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAccurate fuel gauge; Windows shows true remaining runtime and health\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAccurate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMay fail to communicate; laptop may not charge or show incorrect percentage\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003ePhysical Fit\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eExact fit; connector aligns perfectly\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eExact fit\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMay be slightly off; connector may not seat fully\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eCharging Behavior\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSupports ASUS fast charging (if laptop supports it)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSupports fast charging\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMay charge slowly, overheat, or stop charging prematurely\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eLongevity\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e400–500 cycles while maintaining \u0026gt;80% capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e400–500 cycles\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOften drops below 70% capacity within 6–12 months\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003ePrice\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eModerate (sweet spot)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHighest (often 2×)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLowest but highest risk\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eImportant\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe B31N1424 is an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003einternal battery\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. If you install a generic that doesn’t communicate properly with the laptop’s embedded controller, you may not know until you’ve already closed up the case—and then you’re stuck with a laptop that won’t charge, won’t report battery percentage accurately, or shuts down randomly. Saving $20 on a generic isn’t worth the headache.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eWhat Realistic Runtime Can You Expect?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThese ASUS models are older but still capable. A healthy B31N1424 will give you:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eWorkload\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eExpected Runtime\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLight productivity (email, web, Office)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4–6 hours\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVideo streaming (Netflix, YouTube)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3–5 hours\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMixed use (light multitasking)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3–4 hours\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eIf you’re getting significantly less than this, your battery is likely worn out. A genuine‑spec replacement restores original performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eOne Battery vs. Spare: What’s the Real Need?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eSince the B31N1424 is internal, you’re replacing the aging battery. But the choice of \u003c\/span\u003e\u003cem\u003e\u003cspan\u003ewhat\u003c\/span\u003e\u003c\/em\u003e\u003cspan\u003e you install matters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSituation\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eCheap Generic\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eGenuine‑Spec Replacement\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYou need the laptop for classes or remote work\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRisky; unknown runtime, possible sudden shutdowns\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e✔ Consistent performance you can rely on\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYou travel occasionally with the laptop\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUnreliable; could die during a flight or in a coffee shop\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e✔ Dependable runtime when you need it most\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYou plan to keep the ASUS for another 2–3 years\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWill likely need another replacement within a year\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e✔ One replacement covers the rest of the laptop’s useful life\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYou’re selling the laptop or passing it to a family member\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eA generic signals “cheap repair” to a buyer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e✔ A genuine‑spec replacement adds value and confidence\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYou mostly use it plugged in\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMight be acceptable if you don’t mind the risk\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e✔ Still a better long‑term value\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eFor anyone who still relies on these ASUS models, the extra cost of a genuine‑spec battery pays for itself in peace of mind alone.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eHow to Identify a Reliable B31N1424 Replacement\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eBased on feedback from repair shops and ASUS owners, here are three things to look for when buying a B31N1424 battery:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eExact Part Number Match\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe battery should clearly list \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eB31N1424\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. If it says “fits ASUS K401” but doesn’t include this specific number, it’s likely a generic with unknown internals.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBuilt‑in Safety Protection\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eEnsure the battery includes a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ePCM (protection circuit module)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with over‑voltage, under‑voltage, short‑circuit, and temperature protection. This is non‑negotiable for internal laptop batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFresh Stock \u0026amp; Warranty\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eLithium‑ion cells degrade even when unused. A trustworthy supplier will provide a manufacturing date (or guarantee freshness within the last 12 months) and offer a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12‑18 month warranty\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Avoid sellers who can’t provide these details.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eWhat Does a Genuine ASUS B31N1424 Battery Cost?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003ePricing varies significantly based on source and authenticity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSource\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eTypical Price Range (USD)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eWhat You Get\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOEM (ASUS direct \/ authorized service)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e$80 – $110\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGenuine, but with full retail markup\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eThird‑party “Compatible”\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e$25 – $40\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUnknown cell quality; often lower actual capacity; short lifespan\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eGenuine‑Spec Replacement (This Battery)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e$40 – $60\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOEM‑matched cells, true original capacity, full protection circuit, exact compatibility, warranty\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003egenuine‑spec replacement\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e hits the sweet spot: the same internal quality as the OEM version, sold without the inflated brand markup. You avoid the gamble of a generic without paying the premium ASUS price.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Will this battery work with my specific ASUS laptop?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eYes, if your model is in the compatible list.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e This B31N1424 battery works with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eASUS A401LB, K401LB, K401UB, K401UQ, R415UB, and R415UQ\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. To confirm, check your current battery label—if it says \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eB31N1424\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this is the direct replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: How do I know if my current battery needs replacement?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eCommon signs:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe laptop shuts down when unplugged despite showing remaining charge\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBattery percentage jumps erratically (e.g., 60% to 10% suddenly)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWindows reports “consider replacing your battery” in the battery health report\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe battery takes unusually long to charge, or doesn’t charge at all\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePhysical swelling (you may notice the touchpad or bottom case bulging)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eIf your battery is more than 2–3 years old or has seen heavy daily use, it’s likely time.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Can I install the B31N1424 battery myself?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eYes, but it requires opening the laptop.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Most ASUS A401\/K401\/R415 models have a removable bottom cover. Disconnect the battery cable, remove the old battery, install the new one, and reconnect. If you’re comfortable with basic laptop repair, it’s a 10‑minute job. If not, a local repair shop can do it quickly. Always power down and disconnect the charger first.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Will a third‑party battery void my ASUS warranty?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNo.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e In most regions (including the US, under the Magnuson‑Moss Warranty Act), using a third‑party replacement part does not void the warranty unless the part itself caused damage. If your laptop is still under warranty (unlikely for these older models), keep the original battery in case service is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Does this battery support ASUS fast charging?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eYes, if your laptop supports it.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e This genuine‑spec battery supports the same charging protocols as the original.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Is it safe to buy a third‑party ASUS battery?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eYes, if it’s a genuine‑spec replacement.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The key is to verify the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOEM‑matched cells\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003etrue original capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ebuilt‑in protection circuit\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ewarranty\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Avoid sellers who can’t confirm these details or whose prices are suspiciously low—those are often the batteries that swell or fail within months.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan\u003eReady to Get Your ASUS Back to Reliable Portability?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eDon’t let a worn‑out battery turn your trusty ASUS into a desk‑bound machine. This \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003egenuine‑spec B31N1424 replacement\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e gives you the same performance, safety, and runtime as the original—at a price that makes replacing an aging battery a straightforward decision.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eClick ‘Add to Cart’—and get back to using your ASUS where you want, not just where there’s an outlet.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"ACCESSORIES-MALL","offers":[{"title":"Default Title","offer_id":48201240019044,"sku":"B31N1424","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8957\/3220\/files\/B31N1424.jpg?v=1775205507","url":"https:\/\/accessories-mall.com\/products\/genuine-b31n1424-battery-replacement-for-asus-a401lb-k401lb-k401ub-k401uq-r415ub-r415uq-laptop","provider":"Accessories-Mall","version":"1.0","type":"link"}