{"id":5743,"date":"2026-07-24T06:55:47","date_gmt":"2026-07-24T06:55:47","guid":{"rendered":"https:\/\/www.batteriesfast.co.uk\/blogs\/?p=5743"},"modified":"2026-07-24T06:55:55","modified_gmt":"2026-07-24T06:55:55","slug":"5000mah-silicon-carbon-battery-4-1mm-body-samsung-z-fold-8-ultra-a-five-year-leap-in-foldable-battery-life","status":"publish","type":"post","link":"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743","title":{"rendered":"5000mAh Silicon-Carbon Battery + 4.1mm Body: Samsung Z Fold 8 Ultra\u2014A &#8220;Five-Year Leap&#8221; in Foldable Battery Life"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">This marks the first major&nbsp;<strong><u><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\" target=\"_blank\" rel=\"noreferrer noopener\">Samsung Z Fold 8 Ultra smartphone battery<\/a>&nbsp;<\/u><\/strong>capacity upgrade for Samsung&#8217;s foldable series in five years: the Z Fold8 Ultra jumps from the Z Fold 7&#8217;s 4400mAh to 5000mAh.<br>Silicon-Carbon Battery: Samsung Finally Enters the Fray<br>The standout technical feature of the Z Fold8 Ultra&#8217;s battery is Samsung&#8217;s official entry into the silicon-carbon battery market. The core innovation lies in the anode material\u2014replacing some graphite with silicon. Since silicon&#8217;s theoretical lithium-storage capacity is over ten times that of graphite, it significantly boosts energy density, allowing for higher capacity within the same physical volume. This breakthrough enabled Samsung to increase the&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><u><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\" target=\"_blank\" rel=\"noreferrer noopener\">Samsung Z Fold 8 Ultra smartphone battery<\/a><\/u><\/strong>&nbsp;capacity to 5000mAh while actually reducing the unfolded thickness to just 4.1mm (down from the predecessor&#8217;s 4.2mm) and maintaining a weight of 215g.<br>Real-World Battery Test: 27 Hours of Video Playback<br>Samsung claims a maximum video playback time of 27 hours for the Z Fold8 Ultra, compared to 24 hours for the Z Fold 7. It also supports 45W fast charging, reaching 67% capacity in 30 minutes. International media noted: &#8220;For years, Samsung compromised on battery size to save space in its foldables, but with the Fold 8 Ultra, they have finally found a way to accommodate a 5000mAh&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><u><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\" target=\"_blank\" rel=\"noreferrer noopener\">Samsung Z Fold 8 Ultra smartphone battery<\/a><\/u><\/strong>.&#8221;<br>The 5000mAh silicon-carbon battery in the Samsung Galaxy Z Fold 8 Ultra tells a story of long-term development leading to a breakthrough. The upgrades\u2014from 4400mAh to 5000mAh, 4.2mm to 4.1mm, and 25W to 45W\u2014reflect a persistent effort to solve the industry-wide dilemma where &#8220;thinness&#8221; and &#8220;long battery life&#8221; were considered mutually exclusive. As international media put it: &#8220;With the Z Fold8 Ultra, Samsung has finally got the<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><u><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\" target=\"_blank\" rel=\"noreferrer noopener\">Samsung Z Fold 8 Ultra smartphone battery<\/a><\/u><\/strong>&nbsp;right.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Find the best Samsung Smartphone Battery price! Search Batteriesfast.co.uk for&nbsp;<strong><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\" target=\"_blank\" rel=\"noreferrer noopener\">Samsung Smartphone Battery<\/a><\/strong>. Get fast shipping and top-rated customer service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c\uff0c<br><strong><u><a href=\"https:\/\/www.batteriesfast.co.uk\/smartphone-battery\/Samsung\/EB-BG975ABU\/1737607\" target=\"_blank\" rel=\"noreferrer noopener\">3.85V\/4.4V 4000mAh\/ 15.4WH Replacement Smartphone Battery for Samsung EB-BG975ABU<\/a><\/u><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This marks the first major&nbsp;Samsung Z Fold 8 Ultra smartphone battery&nbsp;capacity upgrade for Samsung&#8217;s foldable series in five years: the Z Fold8 Ultra jumps from the Z Fold 7&#8217;s 4400mAh to 5000mAh.Silicon-Carbon Battery: Samsung Finally Enters the FrayThe standout technical feature of the Z Fold8 Ultra&#8217;s battery is Samsung&#8217;s official entry into the silicon-carbon battery [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[259],"tags":[],"class_list":["post-5743","post","type-post","status-publish","format-standard","hentry","category-smartphone-battery-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>5000mAh Silicon-Carbon Battery + 4.1mm Body: Samsung Z Fold 8 Ultra\u2014A &quot;Five-Year Leap&quot; in Foldable Battery Life - Batteries Fast Blog<\/title>\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.batteriesfast.co.uk\/blogs\/archives\/5743\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"5000mAh Silicon-Carbon Battery + 4.1mm Body: Samsung Z Fold 8 Ultra\u2014A &quot;Five-Year Leap&quot; in Foldable Battery Life - Batteries Fast Blog\" \/>\n<meta property=\"og:description\" content=\"This marks the first major&nbsp;Samsung Z Fold 8 Ultra smartphone battery&nbsp;capacity upgrade for Samsung&#8217;s foldable series in five years: the Z Fold8 Ultra jumps from the Z Fold 7&#8217;s 4400mAh to 5000mAh.Silicon-Carbon Battery: Samsung Finally Enters the FrayThe standout technical feature of the Z Fold8 Ultra&#8217;s battery is Samsung&#8217;s official entry into the silicon-carbon battery [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743\" \/>\n<meta property=\"og:site_name\" content=\"Batteries Fast Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-24T06:55:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-24T06:55:55+00:00\" \/>\n<meta name=\"author\" content=\"bella\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"bella\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743\",\"url\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743\",\"name\":\"5000mAh Silicon-Carbon Battery + 4.1mm Body: Samsung Z Fold 8 Ultra\u2014A \\\"Five-Year Leap\\\" in Foldable Battery Life - Batteries Fast Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/#website\"},\"datePublished\":\"2026-07-24T06:55:47+00:00\",\"dateModified\":\"2026-07-24T06:55:55+00:00\",\"author\":{\"@id\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/#\/schema\/person\/77c84eb3fb06925fe618ddb29d55932b\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.batteriesfast.co.uk\/blogs\/archives\/5743#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.batteriesfast.co.uk\/blogs\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"5000mAh Silicon-Carbon Battery + 4.1mm Body: Samsung Z Fold 8 Ultra\u2014A &#8220;Five-Year Leap&#8221; 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