{"id":79434,"date":"2023-01-05T00:09:48","date_gmt":"2023-01-05T08:09:48","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=79434"},"modified":"2023-10-16T14:52:20","modified_gmt":"2023-10-16T21:52:20","slug":"what-does-a-car-battery-gauge-read","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-does-a-car-battery-gauge-read\/","title":{"rendered":"What Does a Car Battery Gauge Read?"},"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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_ec79b3-b5 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_ec79b3-b5 > .kt-inside-inner-col,.kadence-column_ec79b3-b5 > .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_ec79b3-b5 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_ec79b3-b5 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_ec79b3-b5 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_ec79b3-b5 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_ec79b3-b5{position:relative;}@media all and (max-width: 1024px){.kadence-column_ec79b3-b5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_ec79b3-b5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_ec79b3-b5 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-593b0a  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-ac81cb\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_4bedf3-2c, .wp-block-kadence-advancedheading.kt-adv-heading_4bedf3-2c[data-kb-block=\"kb-adv-heading_4bedf3-2c\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_4bedf3-2c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_4bedf3-2c[data-kb-block=\"kb-adv-heading_4bedf3-2c\"] 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_4bedf3-2c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_4bedf3-2c[data-kb-block=\"kb-adv-heading_4bedf3-2c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_4bedf3-2c summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_4bedf3-2c\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Some vehicles use voltmeters that measure system voltage, while others have ammeters that measure amperage to check their charging systems.<\/li><li>The voltmeter should read between 14 and 14.5 volts when the engine is running and should remain there unless there is a significant demand on the electrical system, such as wipers, lights, the heater, and more.<\/li><li>The ammeter should read close to zero when the battery is completely charged and there is little electrical demand, but it should always be on the plus side of zero.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your car battery is the heart of your ride&rsquo;s electrical system. It supplies voltage to anything electrical in your vehicle. A battery gauge&mdash;also referred to as the voltage gauge&mdash;is a tool designed to measure your battery&rsquo;s voltage. You may identify this gauge by looking for the battery symbol. Know more about it by reading this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Read a Battery Gauge on a Car<\/h2>\n\n\n\n<p>Some vehicles use voltmeters that measure system voltage, while others have ammeters that measure amperage to check their charging systems.<\/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\/2023\/01\/car-battery-gauge-showing-voltmeter-1024x683.jpg\" alt=\"car battery gauge showing voltmeter\" class=\"wp-image-79514\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/car-battery-gauge-showing-voltmeter-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Some vehicles use voltmeters that measure system voltage, while others have ammeters that measure amperage to check their charging systems.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Voltmeter<\/h3>\n\n\n\n<p>Most modern vehicles use a <a href=\"https:\/\/www.carparts.com\/voltmeter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"voltmeter\">voltmeter<\/a>. <strong>The electrical system of a modern car runs on 12 volts. When the engine is off, a fully charged battery will measure roughly 12.5 volts. The voltmeter should read between 14 and 14.5 volts when the engine is running and should remain there unless there is a significant demand on the electrical system, such as wipers, lights, the heater, and more.<\/strong><\/p>\n\n\n\n<p>When the charging system is functioning properly, the battery will be recharged as soon as the gas pedal is depressed. Have the system inspected if the voltage is consistently below 14 volts.<\/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<h3 class=\"wp-block-heading\">Ammeter<\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/ammeter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ammeter\">ammeter<\/a> should read close to zero when the battery is completely charged and there is little electrical demand, but it should always be on the plus side of zero. After starting, it&rsquo;s typical for the ammeter to read a high positive amperage in order to recharge the battery. Nevertheless, this positive amperage should soon begin to decline. If the lights, wipers, and other electrical equipment are switched off but the gauge still reads more than 10 or 20 amps, you may have a weak battery and should have it inspected.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is a Key-Off Battery Drain?<\/h2>\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\/2023\/01\/woman-checking-car-old-battery-1024x683.jpg\" alt=\"woman checking car old battery\" class=\"wp-image-79507\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/01\/woman-checking-car-old-battery-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Wondering why your car battery is drained? Your vehicle might be experiencing a parasitic battery drain or Key-off battery drain.<\/figcaption><\/figure>\n\n\n\n<p>Wondering why your car <a href=\"https:\/\/www.carparts.com\/battery\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"battery\">battery<\/a> is drained? Your vehicle might be experiencing a parasitic battery drain or Key-off battery drain. There&rsquo;s a high probability that this is the problem if your battery is under six years old, tests well, and the charging system is functioning normally.<\/p>\n\n\n\n<p>Leaving <a href=\"https:\/\/carparts.com\/blog\/car-lights\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"automotive lights\">automotive lights<\/a>&nbsp; (trunk and hood lights, interior lights, brake lights, etc.) on can drain your car battery. Relays that could be stuck on or modules that aren&rsquo;t going to sleep or powering down are all potential causes of excessive current depletion from a car battery. Anti-theft and keyless entry systems are frequently the cause of a considerable key-off current drain on the battery.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Is the Health of Your Car Battery Important?<\/h2>\n\n\n\n<p>Aside from providing electricity to most components in your vehicle, your battery also acts as a voltage stabilizer. It acts as a reservoir because it can store large amounts of current. This current can be quickly removed during start-up and replaced slowly by the alternator when charging.<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n    {\n        \"@context\": \"https:\/\/schema.org\",\n        \"@type\": \"QAPage\",\n        \"mainEntity\": {\n            \"@type\": \"Question\",\n            \"name\": \"What Does a Car Battery Gauge Read?\",\n            \"text\": \"What Does a Car Battery Gauge Read?\",\n            \"answerCount\": 1,\n            \"upvoteCount\": 0,\n            \"dateCreated\": \"2023-01-05T08:09:48Z\",\n            \"dateModified\": \"2023-05-23T03:12:01Z\",\n            \"author\": {\n                \"@type\": \"Person\",\n                \"name\": \"A user\"\n            },\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Some vehicles use voltmeters that measure system voltage, while others have ammeters that measure amperage to check their charging systems.\",\n                \"upvoteCount\": 0,\n                \"url\": \"https:\/\/www.carparts.com\/blog\/what-does-a-car-battery-gauge-read\/\",\n                \"dateCreated\": \"2023-01-05T00:09:00Z\",\n                \"author\": [{\n                    \"@type\": \"Person\",\n                    \"name\": \"Lisa Conant, Automotive Features Reviewer at CarParts.com\"\n                  },\n                  {\n                    \"@type\": \"Person\",\n                    \"name\": \"CarParts.com Research Team\"\n                }]\n            }\n        }\n    }\n<\/script>\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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your car battery is the heart of your ride&rsquo;s electrical system. It supplies voltage to anything electrical in your vehicle&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/what-does-a-car-battery-gauge-read\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":79516,"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":[52,3758],"tags":[2096,73,1162],"ppma_author":[2607,3269],"class_list":{"0":"post-79434","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-electrical-system","9":"tag-ammeter","10":"tag-battery","11":"tag-voltmeter","12":"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>What Does a Car Battery Gauge Read? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Wondering what a battery gauge does? 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