{"id":42481,"date":"2021-08-05T02:19:08","date_gmt":"2021-08-05T09:19:08","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=42481"},"modified":"2024-06-17T20:30:39","modified_gmt":"2024-06-18T03:30:39","slug":"can-you-overcharge-a-car-battery-common-signs","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/can-you-overcharge-a-car-battery-common-signs\/","title":{"rendered":"Can You Overcharge a Car Battery? Common Signs"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_7fb4e3-68 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_7fb4e3-68 > .kt-inside-inner-col,.kadence-column_7fb4e3-68 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_7fb4e3-68 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_7fb4e3-68 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_7fb4e3-68 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_7fb4e3-68 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_7fb4e3-68{position:relative;}@media all and (max-width: 1024px){.kadence-column_7fb4e3-68 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_7fb4e3-68 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_7fb4e3-68 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-158e25  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-48c7b8\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96, .wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96[data-kb-block=\"kb-adv-heading_a340f0-96\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96[data-kb-block=\"kb-adv-heading_a340f0-96\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_a340f0-96[data-kb-block=\"kb-adv-heading_a340f0-96\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_a340f0-96 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_a340f0-96\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>If you overcharge your car battery you risk putting your vehicle out of commission.<\/li><li>Overcharging a battery can cause excessive gassing that ruins the device, and it can also accumulate flammable hydrogen.<\/li><li>Common causes of an overcharged car battery include a bad alternator, a faulty voltage regulator, and human error.<\/li><li>You may need to recharge your battery when your vehicle refuses to start.<\/li><li>Warning signs include a battery that&rsquo;s hot, curving battery sides, low battery fluid level, and an acid smell.<\/li><li>You can check a battery&rsquo;s state of charge with a multimeter and other tools.<\/li><li>In most cases, you&rsquo;ll have to replace an overcharged car battery, and you might also have to replace other parts.<\/li><li>A battery replacement may cost around $100 to $500 for parts alone.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your car&rsquo;s battery is the heart of your vehicle&rsquo;s electrical system. It provides the jolt of electricity needed to start the engine and powers other electrical components in your vehicle. A battery can last around three to five years. However, certain conditions like overcharging may contribute to its premature failure.<\/p>\n\n\n\n<p>So, can you overcharge your car battery? The short answer is yes. This may leave your vehicle out of commission until the <a href=\"https:\/\/www.carparts.com\/blog\/my-car-battery-wont-hold-a-charge-what-do-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"faulty battery\">faulty battery<\/a> is replaced.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens When You Overcharge a Battery?<\/h2>\n\n\n\n<p>In most cases, an overcharged battery will eventually become ruined due to excessive gassing. With an older vented battery, the electrolyte boils away, ruining the battery&rsquo;s plates. If your car has a newer, sealed-style battery, the battery may burst due to the internal buildup of gases.<\/p>\n\n\n\n<p>Flammable hydrogen can also accumulate inside the battery&rsquo;s sealed cells and make its casing swell, and the hydrogen may seep through the vents and mix with oxygen. This can spell disaster because one spark can ignite the gas and make the battery explode. This may also damage other parts surrounding the battery.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-1024x682.jpg\" alt=\"car battery charging\" class=\"wp-image-42484\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/car-battery-charging.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>In most cases, an overcharged battery will eventually become ruined due to excessive gassing.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Can Cause an Overcharged Car Battery?<\/h2>\n\n\n\n<p>Overcharging a battery can result in costly repairs and part replacements. Here are some of the most common causes of overcharging you should watch out for:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bad Voltage Regulator or Alternator<\/h3>\n\n\n\n<p>Most vehicles today come with alternators that have internal voltage regulators, which supply a controlled electrical charge to the battery while the engine is running. If a <a href=\"https:\/\/www.carparts.com\/blog\/bad-voltage-regulator-symptoms-testing-replacement-cost-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"voltage regulator malfunctions\">voltage regulator malfunctions<\/a>, it may send an uncontrolled voltage to the battery, resulting in an overcharged condition.<\/p>\n\n\n\n<p>In some cases, an incompatible alternator replacement may also cause car battery overcharging. So if you need to replace your alternator, make sure to buy one that&rsquo;s compatible with your ride.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Human Error<\/h3>\n\n\n\n<p>Charging your battery with incorrect volts or high amp charger settings can <a href=\"https:\/\/www.carparts.com\/blog\/trouble-under-the-hood-why-is-my-car-battery-smoking-up\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"overheat your car battery\">overheat your car battery<\/a> or charge it faster than usual. Overcharging can also happen if you leave your battery charged for too long.<\/p>\n\n\n\n<p>Read up on how to properly charge your car battery or have your mechanic talk you through the process. Make sure to always use the correct charger and settings for your vehicle to avoid overcharging.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">When Should You Charge a Car Battery?<\/h2>\n\n\n\n<p>You may need to recharge your battery when your vehicle refuses to start. Take note, however, that this usually means that your battery is nearing the end of its service life. Have your vehicle checked right away to determine its battery&rsquo;s status and identify the faulty parts (if there are any) that are draining the charge.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Signs of an Overcharged Car Battery<\/h2>\n\n\n\n<p>The damage caused by frequent overcharging won&rsquo;t be noticeable from behind the wheel. You&rsquo;ll have to open the hood, visually inspect your battery, and keep an eye out for these telltale signs:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hot Battery<\/h3>\n\n\n\n<p>A car battery that&rsquo;s too hot to touch even after resting your vehicle for more than thirty minutes may be overcharged. Have your ride inspected by your mechanic right away, and replace any faulty charging system components that may be causing the issue.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-1024x682.jpg\" alt=\"man replacing car battery\" class=\"wp-image-42483\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/man-replacing-car-battery.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A car battery that&rsquo;s too hot to touch even after resting your vehicle for more than thirty minutes may be overcharged.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Curved Battery Sides<\/h3>\n\n\n\n<p>Pressure build-up and the overproduction of gasses inside your battery can cause swelling. As a result, you may notice the sides of your car battery are curved.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Constant Drop in Battery Fluid Level<\/h3>\n\n\n\n<p>If your battery is not sealed and you notice the fluid level dropping more often than it should, then you may have an overcharged battery.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Acid-like Smell<\/h3>\n\n\n\n<p>As the heat of an overcharged battery boils off acid, you may smell an unusual acid-like odor from under the hood. If the smell isn&rsquo;t coming from your car battery, there&rsquo;s a high chance something else is wrong with your engine, so take your vehicle to your mechanic for an accurate diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Test a Car Battery<\/h2>\n\n\n\n<p>You can check a&nbsp; battery&rsquo;s state of charge with a multimeter, a device used to measure voltage, amperage, continuity, and resistance in electrical components.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How to Use a Multimeter for Beginners - How to Measure Voltage, Resistance, Continuity and Amps\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/TdUK6RPdIrA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>You won&rsquo;t be able to conclude your battery&rsquo;s condition based on multimeter readings alone, but it&rsquo;s a good place to start. Check out this <a href=\"https:\/\/www.carparts.com\/blog\/how-to-test-a-car-battery-with-a-multimeter\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"step-by-step guide\">step-by-step guide<\/a> on how to test your car battery using a multimeter.<\/p>\n\n\n\n<p>Fully charged car batteries usually give out approximately 12.6 volts when the engine is off. If the voltage is significantly higher, you may be dealing with an overcharged battery.<\/p>\n\n\n\n<p>If you&rsquo;re not used to doing DIY car repairs and tests, it&rsquo;s best to leave the job to a trusted professional.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Repair an Overcharged Battery<\/h2>\n\n\n\n<p>In most cases, you&rsquo;ll have to replace an overcharged car battery, especially if the damage is extensive. You may also have to replace other components, depending on what&rsquo;s causing the issue. For instance, if a faulty alternator caused the problem, you&rsquo;ll need to replace it along with your damaged battery to keep the same issue from happening again.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get a Replacement Battery That Fits Your Vehicle<\/h2>\n\n\n\n<p>If you&rsquo;re thinking of driving around with an overcharged battery, think again. Not only can an overcharged battery accumulate gas and start swelling, it can also explode. For your own safety, it&rsquo;s best to replace your overcharged battery as soon as possible. Luckily, getting a brand-new battery is fast and easy with CarParts.com.<\/p>\n\n\n\n<p>CarParts.com offers a wide selection of car batteries, all sourced from the most trusted manufacturers in the industry. Plus, you can easily browse through them by using our vehicle selector and search filters. Just be sure to input your vehicle&rsquo;s correct details. Thanks to our strategically located warehouses around the US, CarParts.com also guarantees fast shipping. Order by 12 p.m. ET, and you can expect your new battery to arrive in as fast as two business days.<\/p>\n\n\n\n<p>Don&rsquo;t wait until your battery completely dies before getting a new one. Check out our catalog of high-quality <a href=\"https:\/\/www.carparts.com\/battery\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"batteries\">batteries<\/a> at CarParts.com today!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your car&rsquo;s battery is the heart of your vehicle&rsquo;s electrical system. It provides the jolt of electricity needed to start&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/can-you-overcharge-a-car-battery-common-signs\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":42485,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3744],"tags":[73],"ppma_author":[2607],"class_list":{"0":"post-42481","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-ignition-system","9":"tag-battery","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Can You Overcharge a Car Battery? Common Signs - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Overcharging can affect your battery\u2019s service life and damage it completely. Learn more about car battery overcharging through this article.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/can-you-overcharge-a-car-battery-common-signs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can You Overcharge a Car Battery? Common Signs - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Overcharging can affect your battery\u2019s service life and damage it completely. Learn more about car battery overcharging through this article.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/can-you-overcharge-a-car-battery-common-signs\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-05T09:19:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-06-18T03:30:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/preparing-to-charge-car-battery.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1700\" \/>\n\t<meta property=\"og:image:height\" content=\"1133\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/can-you-overcharge-a-car-battery-common-signs\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/can-you-overcharge-a-car-battery-common-signs\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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