{"id":63218,"date":"2025-07-14T21:52:54","date_gmt":"2025-07-14T21:52:54","guid":{"rendered":"https:\/\/www.adapter-laptop.com\/blog\/asus-c21n1701-39wh-battery-replacement-guide-compatible-vivobook-s14-x406-models-au-nz\/"},"modified":"2025-07-14T21:52:54","modified_gmt":"2025-07-14T21:52:54","slug":"asus-c21n1701-39wh-battery-replacement-guide-compatible-vivobook-s14-x406-models-au-nz","status":"publish","type":"post","link":"https:\/\/www.adapter-laptop.com\/blog\/asus-c21n1701-39wh-battery-replacement-guide-compatible-vivobook-s14-x406-models-au-nz\/","title":{"rendered":"ASUS C21N1701 39Wh Battery Replacement Guide | Compatible VivoBook S14 &#038; X406 Models | AU\/NZ"},"content":{"rendered":"<h1>ASUS C21N1701 39Wh Laptop Battery Replacement Guide<\/h1>\n<p>If your ASUS VivoBook is struggling to hold a charge or shutting down unexpectedly, you&#8217;ve come to the right place. This comprehensive guide covers everything Australian and New Zealand consumers need to know about replacing their laptop battery with the genuine ASUS C21N1701 39Wh model.<\/p>\n<div style=\"text-align:center; margin:30px 0;\"><a href=\"https:\/\/www.adapter-laptop.com\/battery\/5083-asus-c21n1701-39wh-battery.html\" style=\"display:inline-block;\"><img decoding=\"async\" src=\"https:\/\/www.adapter-laptop.com\/28756-large_default\/asus-c21n1701-39wh-battery.jpg\" alt=\"ASUS C21N1701 39Wh Replacement Battery\" style=\"max-width:100%; height:auto; border:1px solid #ddd; border-radius:8px;\"><\/a><\/div>\n<div style=\"text-align:center; margin:20px 0;\"><a href=\"https:\/\/www.adapter-laptop.com\/battery\/5083-asus-c21n1701-39wh-battery.html\" style=\"background:#007bff; color:white; padding:15px 30px; text-decoration:none; border-radius:5px; font-weight:bold; display:inline-block;\">Buy Genuine ASUS C21N1701 Battery<\/a><\/div>\n<h2>Battery models &#038; part numbers<\/h2>\n<div class=\"table-scroll\" style=\"overflow-x:auto;\">\n<table style=\"width:100%; border-collapse:collapse;\">\n<thead>\n<tr style=\"background:#f8f9fa;\">\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Reference \/ P\/N<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">0B200-02640000<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Asus-C21N1701-39Wh<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">C21PQC5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Compatible models<\/h2>\n<div class=\"table-scroll\" style=\"overflow-x:auto;\">\n<table style=\"width:100%; border-collapse:collapse;\">\n<thead>\n<tr style=\"background:#f8f9fa;\">\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Model<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Asus VivoBook S14 S406<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Asus VivoBook S14 S406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Asus VivoBook X406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Asus X406 X406U X406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">K406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">S406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">V406U<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">V406UA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">V406UA7100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Introduction<\/h2>\n<p>Laptop batteries naturally degrade over time, and ASUS VivoBook owners across Australia and New Zealand often find themselves needing replacements after 2-3 years of regular use. The ASUS C21N1701 39Wh battery is the official replacement for multiple VivoBook models, providing the same reliable performance as your original battery.<\/p>\n<h2>Common signs you need a replacement<\/h2>\n<div class=\"table-scroll\" style=\"overflow-x:auto;\">\n<table style=\"width:100%; border-collapse:collapse;\">\n<thead>\n<tr style=\"background:#f8f9fa;\">\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Symptom<\/th>\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Cause<\/th>\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Verification<\/th>\n<th style=\"border:1px solid #ddd; padding:12px; text-align:left;\">Recommendation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Battery drains quickly<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Reduced capacity from age\/cycles<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Check battery health in Windows<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Replace if under 50% capacity<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Laptop shuts down unexpectedly<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Battery can&#8217;t maintain voltage<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Monitor battery percentage drops<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Immediate replacement needed<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Battery won&#8217;t charge fully<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Charging circuit or battery failure<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Check charging indicator light<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Replace battery first<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Laptop bulging or uneven<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Battery swelling &#8211; safety hazard<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Visual inspection of case<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Replace immediately &#8211; do not use<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:12px;\">Overheating during use<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Battery internal resistance increase<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Feel bottom case temperature<\/td>\n<td style=\"border:1px solid #ddd; padding:12px;\">Replace to prevent damage<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>How to check compatibility<\/h2>\n<p>Finding your exact ASUS model number is crucial for battery compatibility. For VivoBook S14 and X406 series laptops, check the bottom label near the battery compartment or serial number sticker. The model typically starts with &#8220;S406&#8221;, &#8220;X406&#8221;, &#8220;V406&#8221;, or &#8220;K406&#8221; followed by additional letters\/numbers. You can also find this information in Windows by pressing Windows Key + R, typing &#8220;msinfo32&#8221;, and looking under &#8220;System Model&#8221;. ASUS provides official compatibility tools on their Australian support website, but the C21N1701 is confirmed compatible with all models listed in our compatibility table.<\/p>\n<h2>When to replace<\/h2>\n<p>Most ASUS VivoBook batteries last 300-500 full charge cycles before significant degradation occurs. If your battery health shows less than 60% of original capacity in Windows battery report, it&#8217;s time to consider replacement. Australian consumers should particularly note that our warmer climate can accelerate battery degradation, so replacement may be needed sooner than in cooler regions.<\/p>\n<div style=\"text-align:center; margin:30px 0;\"><a href=\"https:\/\/www.adapter-laptop.com\/battery\/5083-asus-c21n1701-39wh-battery.html\" style=\"display:inline-block;\"><img decoding=\"async\" src=\"https:\/\/www.adapter-laptop.com\/28756-large_default\/asus-c21n1701-39wh-battery.jpg\" alt=\"Genuine ASUS Replacement Battery\" style=\"max-width:100%; height:auto; border:1px solid #ddd; border-radius:8px;\"><\/a><\/div>\n<h2>Installation guide<\/h2>\n<p>Replacing the battery in your ASUS VivoBook is straightforward but requires care. First, power off the laptop and disconnect the charger. Flip it over and locate the battery release latches &#8211; most VivoBook models have two sliding locks. Slide both to unlock position, then gently lift the battery out. Align the new C21N1701 battery with the connectors, press firmly until it clicks into place, then slide the locks back to secure. Power on and allow the system to recognise the new battery. The entire process takes 5-10 minutes and requires only a clean workspace and steady hands.<\/p>\n<h2>Usage &#038; care tips<\/h2>\n<p>To maximise your new ASUS battery&#8217;s lifespan, avoid frequent full discharges &#8211; try to keep between 20-80% charge for daily use. Don&#8217;t leave your laptop plugged in constantly at 100%, and avoid exposing it to temperatures above 35\u00b0C. For Australian conditions, never leave your laptop in a hot car. Calibrate your battery monthly by charging to 100%, then discharging to about 5% before recharging. Store your laptop in a cool, dry place when not in use.<\/p>\n<h2>Safety &#038; recycling in AU\/NZ<\/h2>\n<p>Lithium-ion batteries require proper handling. Never attempt to open or puncture the battery casing. If you notice swelling, overheating, or unusual odours, stop using immediately and contact a professional. In Australia and New Zealand, never dispose of laptop batteries in household waste. Most electronics retailers offer free battery recycling services. Officeworks, JB Hi-Fi, and Battery World all participate in battery recycling programmes. Some local councils also provide battery disposal services at recycling centres.<\/p>\n<div style=\"text-align:center; margin:20px 0;\"><a href=\"https:\/\/www.adapter-laptop.com\/battery\/5083-asus-c21n1701-39wh-battery.html\" style=\"background:#007bff; color:white; padding:15px 30px; text-decoration:none; border-radius:5px; font-weight:bold; display:inline-block;\">Get Your Replacement Battery Today<\/a><\/div>\n<h2>FAQ<\/h2>\n<h3>How long does the C21N1701 battery last on a single charge?<\/h3>\n<p>The 39Wh capacity typically provides 4-6 hours of mixed usage depending on your VivoBook model and usage patterns. Higher performance models may see slightly shorter runtime.<\/p>\n<h3>Is this battery genuine ASUS?<\/h3>\n<p>Yes, the C21N1701 is the official ASUS part number and meets all original equipment specifications for compatibility and safety.<\/p>\n<h3>Will replacing the battery void my warranty?<\/h3>\n<p>If your laptop is still under manufacturer&#8217;s warranty, we recommend checking with ASUS Australia first. For out-of-warranty devices, battery replacement does not affect other components.<\/p>\n<h3>How do I know if my battery is swelling?<\/h3>\n<p>Check if your laptop sits unevenly on a flat surface, or if the trackpad becomes difficult to click. The bottom case may also feel tighter or show gaps.<\/p>\n<h3>Can I use a higher capacity battery?<\/h3>\n<p>No, the C21N1701 is specifically designed for your VivoBook&#8217;s power requirements and physical dimensions. Using non-compatible batteries can damage your laptop.<\/p>\n<h3>How long does shipping take to Australia\/New Zealand?<\/h3>\n<p>Most suppliers offer 5-10 business day delivery to major Australian cities and 7-14 days to regional areas and New Zealand.<\/p>\n<h3>What if the new battery doesn&#8217;t work?<\/h3>\n<p>Ensure all connections are secure and try resetting the EC (Embedded Controller) by holding the power button for 40 seconds with battery and charger disconnected. If issues persist, contact the supplier for warranty support.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ASUS C21N1701 39Wh Laptop Battery Replacement Guide If your ASUS VivoBook is struggling to hold a charge or shutting down [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[],"tags":[],"class_list":["post-63218","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ASUS C21N1701 39Wh Battery Replacement Guide | Compatible VivoBook S14 &amp; 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