{"id":20938,"date":"2026-01-06T13:26:33","date_gmt":"2026-01-06T11:26:33","guid":{"rendered":"https:\/\/www.notebook-doktor.de\/2026\/01\/easily-replace-your-laptop-bios-battery"},"modified":"2026-05-26T20:13:58","modified_gmt":"2026-05-26T18:13:58","slug":"easily-replace-your-laptop-bios-battery","status":"publish","type":"post","link":"https:\/\/www.notebook-doktor.de\/en\/2026\/01\/easily-replace-your-laptop-bios-battery","title":{"rendered":"Easily replace your laptop BIOS battery"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"20938\" class=\"elementor elementor-20938 elementor-12231\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7f3f51ad e-con-full e-flex e-con e-parent\" data-id=\"7f3f51ad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5630cb72 elementor-widget elementor-widget-text-editor\" data-id=\"5630cb72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>BIOS<\/strong> stands for <strong><a href=\"https:\/\/www.it-service24.com\/lexikon\/b\/basic\/\">Basic<\/a> Input Output System<\/strong> and is the laptop\u2019s actual <a href=\"https:\/\/www.it-service24.com\/lexikon\/f\/firmware\/\" target=\"_blank\" rel=\"noopener\"><strong>firmware<\/strong><\/a>. The software stored in the BIOS is activated immediately after you turn on the computer. The <strong>BIOS<\/strong> then ensures, for example, that the operating system is loaded and started.  <\/p><p><strong>The standard battery type is a CR2032 or CR2025 lithium coin cell with a lifespan of 5 to 10 years.<\/strong><\/p><p>If your BIOS settings get messed up or a reset is needed, temporarily removing the BIOS battery or the main battery often helps. This article covers <strong>battery types<\/strong>, <strong>the procedure<\/strong>, <strong>BitLocker risks<\/strong>, and <strong>what should be checked after a repair<\/strong>. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2da633c5 e-con-full e-flex e-con e-parent\" data-id=\"2da633c5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e33c75b elementor-widget elementor-widget-image\" data-id=\"e33c75b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"914\" height=\"514\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie.png\" class=\"attachment-full size-full wp-image-20932\" alt=\"BIOS_Battery\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-300x169.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-768x432.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-560x315.png 560w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-250x141.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-550x309.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-800x450.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-320x180.png 320w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-533x300.png 533w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS_Batterie-889x500.png 889w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2465946 e-con-full e-flex e-con e-parent\" data-id=\"2465946\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-376095cd elementor-toc--minimized-on-mobile elementor-toc--content-ellipsis elementor-widget elementor-widget-table-of-contents\" data-id=\"376095cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:&quot;.comment-reply-title, .kat-title&quot;,&quot;no_headings_message&quot;:&quot;Es wurden keine \\u00dcberschriften auf dieser Seite gefunden.&quot;,&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;icon icon-right-arrow1&quot;,&quot;library&quot;:&quot;ekiticons&quot;,&quot;rendered_tag&quot;:&quot;&lt;i class=\\&quot;icon icon-right-arrow1\\&quot;&gt;&lt;\\\/i&gt;&quot;},&quot;minimized_on&quot;:&quot;mobile&quot;,&quot;_animation&quot;:&quot;none&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__376095cd\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__376095cd\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__376095cd\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-41f495d3 e-con-full e-flex e-con e-parent\" data-id=\"41f495d3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5280ff13 elementor-widget elementor-widget-heading\" data-id=\"5280ff13\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Signs of a dead BIOS battery<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54a234b0 elementor-widget elementor-widget-text-editor\" data-id=\"54a234b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>Incorrect system time after every startup<\/li><li>Error message <strong>&#8220;CMOS Checksum Error&#8221;<\/strong> during boot<\/li><li>Loss of BIOS settings (boot order, fan profiles)<\/li><\/ul><p>To ensure that saved data is retained even if the power supply is interrupted, (almost) every laptop has a small battery that stores the BIOS settings: the <strong>laptop BIOS battery<\/strong>. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c355b3 elementor-widget elementor-widget-image\" data-id=\"1c355b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"914\" height=\"514\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03.png\" class=\"attachment-full size-full wp-image-20933\" alt=\"BIOS-Battery-03\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-300x169.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-768x432.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-560x315.png 560w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-250x141.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-550x309.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-800x450.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-320x180.png 320w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-533x300.png 533w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-03-889x500.png 889w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">In this version, the BIOS battery is connected to the laptop\u2019s motherboard via two cables and a connector.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28bee08 elementor-widget elementor-widget-text-editor\" data-id=\"28bee08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In some cases, it can be helpful to reset the BIOS to factory settings\u2014for example, if you made <strong>incorrect settings<\/strong> in the <strong>BIOS<\/strong> and the system no longer works properly as a result. Depending on the laptop manufacturer and model, there are different methods for performing a BIOS reset via the operating system.  <\/p><p><strong>However, the safest method is to briefly remove the BIOS battery. We\u2019ve put together everything you need to keep in mind in this article. <\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5f72cb17 e-con-full e-flex e-con e-parent\" data-id=\"5f72cb17\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-520f6997 elementor-widget elementor-widget-heading\" data-id=\"520f6997\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Locating the laptop BIOS battery<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07d1150 elementor-widget elementor-widget-image\" data-id=\"07d1150\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"914\" height=\"514\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01.png\" class=\"attachment-full size-full wp-image-20934\" alt=\"BIOS-Battery-01\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-300x169.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-768x432.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-560x315.png 560w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-250x141.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-550x309.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-800x450.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-320x180.png 320w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-533x300.png 533w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-01-889x500.png 889w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">In this version, the BIOS battery is mounted directly on the motherboard via a socket.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45c8c6c4 elementor-widget elementor-widget-text-editor\" data-id=\"45c8c6c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>First, you need to open the laptop and <strong>locate the BIOS battery<\/strong>. Very often, the laptop BIOS battery is a standard <strong>CR 2032 battery<\/strong>, which is either mounted directly on the motherboard in a socket or connected to the motherboard via cables and a connector. <\/p><p>However, many current laptop models no longer have a dedicated laptop BIOS battery at all. In that case, the built-in laptop battery is used to supply the BIOS chip with power continuously. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d4a680f e-flex e-con-boxed e-con e-parent\" data-id=\"d4a680f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9862ffa elementor-widget elementor-widget-video\" data-id=\"9862ffa\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=iks58KpUpdE&amp;t=1s&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-25f47b0c e-con-full e-flex e-con e-parent\" data-id=\"25f47b0c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7f544b4a elementor-widget elementor-widget-heading\" data-id=\"7f544b4a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Performing a BIOS\/UEFI reset correctly<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8233599 elementor-widget elementor-widget-image\" data-id=\"8233599\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"914\" height=\"514\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02.png\" class=\"attachment-full size-full wp-image-20935\" alt=\"BIOS-Battery-02\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-300x169.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-768x432.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-560x315.png 560w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-250x141.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-550x309.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-800x450.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-320x180.png 320w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-533x300.png 533w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-02-889x500.png 889w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">In this version, the BIOS battery is also connected to the laptop\u2019s motherboard via two cables and a connector.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6869466e elementor-widget elementor-widget-text-editor\" data-id=\"6869466e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>To perform a <strong>BIOS\/UEFI reset<\/strong>, you need to briefly remove and reinstall the laptop BIOS battery\u2014or, if there is no separate BIOS battery, the laptop battery.<\/p><p>How long the battery needs to be disconnected to guarantee a <strong>BIOS reset<\/strong> depends on whether there is still short-term buffering via capacitors, for example.<\/p><p>Usually it\u2019s only a few seconds, but a few minutes should definitely be enough to ensure the correct <strong>BIOS reset<\/strong>. Another option is to briefly short the two contacts on the motherboard after removing the BIOS battery. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7f92e481 e-con-full e-flex e-con e-parent\" data-id=\"7f92e481\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-76d95f2f elementor-widget elementor-widget-heading\" data-id=\"76d95f2f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">A curiosity when removing a laptop BIOS battery on a DELL laptop<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85efad3 elementor-widget elementor-widget-image\" data-id=\"85efad3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"914\" height=\"686\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04.png\" class=\"attachment-full size-full wp-image-20936\" alt=\"BIOS-Battery-04\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-300x225.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-768x576.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-250x188.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-550x413.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-800x600.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-240x180.png 240w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-400x300.png 400w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/BIOS-Batterie-04-666x500.png 666w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Here, for example, you\u2019ll look in vain for a BIOS battery in the laptop. Because the laptop battery is built in, its energy storage is used to power the BIOS.  <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d9d34ca elementor-widget elementor-widget-text-editor\" data-id=\"4d9d34ca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>While researching this topic in our notebook workshop, one of our technicians reported a curious case. During a laptop repair, the laptop <strong>BIOS battery<\/strong> was briefly removed on a DELL laptop. When the repair was finished and the laptop was started again, the system unexpectedly asked for the <strong>BitLocker key<\/strong>.  <\/p><p><strong>BitLocker<\/strong> is a Microsoft encryption product that protects user data on the computer. If a BitLocker issue occurs, you\u2019ll see a prompt for a BitLocker recovery key. If you don\u2019t have a working recovery key, you can\u2019t access the computer. You need this key, for example, if you want to install a hard drive in another device, the RAM changes, or a different motherboard is installed. Up to that point, we had never experienced a <strong>BIOS reset<\/strong> triggering a BitLocker key prompt.    <\/p><p>So we were in a tough spot. Our customer couldn\u2019t provide a recovery key. So we had to look for another solution. After some research, we managed to disable a security feature on this DELL laptop so that this prompt for the <strong>BitLocker key<\/strong> no longer appeared.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d1f13a0 e-con-full e-flex e-con e-parent\" data-id=\"5d1f13a0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a928f42 elementor-widget elementor-widget-heading\" data-id=\"a928f42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Note on repairs for notebooks with built-in batteries and no dedicated BIOS battery<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-160f0dfc elementor-widget elementor-widget-text-editor\" data-id=\"160f0dfc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>As a general safety measure, a notebook should be powered down before any repair by removing the battery. On devices with a built-in battery and no dedicated BIOS battery, however, this inevitably leads to the loss of BIOS settings. <\/strong><\/p><p><strong>In these cases, after the repair you usually need to set the date and time again in the BIOS, and in rare cases more as well\u2014for example, switching UEFI\/Legacy mode.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-54e4149 e-con-full e-flex e-con e-parent\" data-id=\"54e4149\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f3ed084 elementor-widget elementor-widget-heading\" data-id=\"f3ed084\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">No BIOS battery installed in the notebook<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-506b37e elementor-widget elementor-widget-image\" data-id=\"506b37e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"914\" height=\"514\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie.png\" class=\"attachment-full size-full wp-image-20937\" alt=\"Notebook without BIOS battery\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie.png 914w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-300x169.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-768x432.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-560x315.png 560w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-250x141.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-550x309.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-800x450.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-320x180.png 320w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-533x300.png 533w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Notebook-ohne-BIOS-Batterie-889x500.png 889w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">The internal battery takes over the function of the BIOS battery.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb3fc24 elementor-widget elementor-widget-text-editor\" data-id=\"bb3fc24\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Many current laptop models <strong>no longer have a dedicated laptop BIOS battery<\/strong>. In that case, the built-in <strong>laptop battery<\/strong> is used to supply the BIOS chip with power continuously. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-57e0497e e-con-full e-flex e-con e-parent\" data-id=\"57e0497e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3071911f elementor-widget elementor-widget-heading\" data-id=\"3071911f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Where can I order the CMOS battery?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29acbc51 elementor-widget elementor-widget-text-editor\" data-id=\"29acbc51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><strong>You can buy over 17,000 CMOS batteries in our shop.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-721f5fb1 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"721f5fb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/www.ipc-computer.de\/advanced_search_result.php?keywords=cmos+battery\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\"> Buy CMOS battery<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9f38718 e-con-full e-flex e-con e-parent\" data-id=\"9f38718\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-517d1010 e-con-full e-flex e-con e-child\" data-id=\"517d1010\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-63dad071 elementor-widget elementor-widget-text-editor\" data-id=\"63dad071\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Our IPC computer technicians carry out hundreds of BIOS and motherboard repairs every year\u2014so we\u2019re familiar with rare cases too, such as BitLocker key prompts after BIOS resets. BIOS repairs are almost always worth it.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-595d23c2 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"595d23c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"258\" src=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-768x258.png\" class=\"attachment-medium_large size-medium_large wp-image-19614\" alt=\"Logo_Tip_Notebook_Doctor\" srcset=\"https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-768x258.png 768w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-300x101.png 300w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-250x84.png 250w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-550x184.png 550w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-800x268.png 800w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-537x180.png 537w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1-895x300.png 895w, https:\/\/www.notebook-doktor.de\/wp-content\/uploads\/Logo_Tipp_Notebook_doktor-1.png 1181w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3893c8e e-flex e-con-boxed e-con e-parent\" data-id=\"3893c8e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba5ad55 elementor-widget elementor-widget-video\" data-id=\"ba5ad55\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=ptSSBUoMyVY&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>If your BIOS settings get messed up or a reset is needed, temporarily removing the BIOS battery or the main battery often helps. This article covers battery types, the procedure, BitLocker risks, and what you should check after a repair.  <\/p>\n","protected":false},"author":9,"featured_media":20932,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_ipc_editorial_status":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6279],"tags":[6353,6354,6355,6356],"class_list":["post-20938","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bios-repair","tag-bios-reset","tag-laptop-bios-battery","tag-laptop-repair-2","tag-notebook-bios"],"acf":{"website_title":"","website_subtitle":"","website_excerpt":"","expert_tip":[]},"ipc_editorial_status":"","yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Easily replace your laptop BIOS battery &#8226; Notebook-Doktor<\/title>\n<meta name=\"description\" content=\"Learn how to replace your laptop\u2019s BIOS battery\u2014even if it\u2019s under the keyboard. Plus: BIOS reset risks and the BitLocker trap.\" \/>\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.notebook-doktor.de\/en\/2026\/01\/easily-replace-your-laptop-bios-battery\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Easily replace your laptop BIOS battery\" \/>\n<meta property=\"og:description\" content=\"Learn how to replace your laptop\u2019s BIOS battery\u2014even if it\u2019s under the keyboard. 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