{"id":710414,"date":"2026-07-25T11:43:12","date_gmt":"2026-07-25T11:43:12","guid":{"rendered":"https:\/\/www.newsbeep.com\/uk\/710414\/"},"modified":"2026-07-25T11:43:12","modified_gmt":"2026-07-25T11:43:12","slug":"samsung-galaxy-z-fold-8-fold-8-ultra-and-flip-8-battery-life-tested-silicon-carbon-pays-off","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/uk\/710414\/","title":{"rendered":"Samsung Galaxy Z Fold 8, Fold 8 Ultra, and Flip 8 battery life tested \u2014 silicon carbon pays off"},"content":{"rendered":"

As much as I rave about the extra utility that the best foldable phones<\/a> have over traditional slabs, there\u2019s one unspoken compromise they make: subpar battery life. Even though I personally don’t mind topping off at some point during the workday, doing so can be a deal breaker for anyone who craves all-day endurance.<\/p>\n

With the launch of Samsung\u2019s new foldables, they certainly have a lot to prove \u2014 more so when they\u2019re also some of the thinnest and lightest models to date. The Galaxy Z Flip 8<\/a>, Z Fold 8<\/a>, and Z Fold 8 Ultra<\/a> are notable as the first Samsung devices to adopt silicon-carbon batteries, which pack more capacity without adding extra bulk.<\/p>\n

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Paired with the power-efficient Snapdragon 8 Elite Gen 5 <\/a>silicon, they\u2019re bound to be some of the longest-lasting foldables to pass through the Tom\u2019s Guide labs. After putting them through a barrage of battery drain tests, I can tell you they don\u2019t disappoint.<\/p>\n

Latest Videos FromTom’s Guide<\/p>\n

Galaxy Z Fold 8 vs Fold 8 Ultra vs Flip 8: Battery life results<\/p>\n

Swipe to scroll horizontally<\/p>\n

Row 0 – Cell 0 <\/p>\n

Battery Capacity (mAh)<\/p>\n

Battery Life (hrs:mins)<\/p>\n

Galaxy Z Flip 8<\/p>\n

4,300 mAh<\/p>\n

12:50<\/p>\n

Galaxy Z Flip 7<\/p>\n

4,300 mAh<\/p>\n

12:24<\/p>\n

Razr Ultra (2026)<\/p>\n

5,000 mAh<\/p>\n

16:20<\/p>\n

Interestingly, the Z Flip 8\u2019s battery life performance doesn\u2019t seem as dramatic as the other phones \u2014 especially considering it packs the same 4,300 mAh capacity as before. What\u2019s different this time is how Samsung engineered the phone to be thinner and lighter than its predecessor without compromising on battery capacity.<\/p>\n

The new flip-style phone clocks in at 12 hours and 50 minutes, representing a 3.5% increase over the Flip 7\u2019s<\/a> 12:24 runtime. Against its biggest rival, the Razr Ultra (2026)<\/a>, Motorola still holds the title of the longest-lasting flip phone with a time of 16 hours and 20 minutes. That\u2019s a huge gap, primarily aided by Motorola’s massive 5,000 mAh battery.<\/p>\n

You may like<\/p>\n

Swipe to scroll horizontally<\/p>\n

Row 0 – Cell 0 <\/p>\n

Battery Capacity (mAh)<\/p>\n

Battery Life (hrs:mins)<\/p>\n

Galaxy Z Fold 8<\/p>\n

4,800 mAh<\/p>\n

12:20<\/p>\n

Galaxy Z Fold 8 Ultra<\/p>\n

5,000 mAh<\/p>\n

14:09<\/p>\n

Galaxy Z Fold 7<\/p>\n

4,400 mAh<\/p>\n

10:44<\/p>\n

Razr Fold<\/p>\n

6,000 mAh<\/p>\n

14:44<\/p>\n

Pixel 10 Pro Fold<\/p>\n

5,015 mAh<\/p>\n

12:16<\/p>\n

Despite this, where Samsung truly makes a massive leap is in its flagship book-style foldables. The premier Galaxy Z Fold 8 Ultra logs an extraordinary 14 hours and 9 minutes, blowing past the Z Fold 7\u2019s<\/a> 10 hours and 44 minutes. That\u2019s an impressive 31.8% increase in endurance. Likewise, the Galaxy Z Fold 8 also sees a substantial gain at 12 hours and 20 minutes \u2014 a 14.8% improvement compared to last year’s Fold 7.<\/p>\n

Against its key rivals, the Z Fold 8 Ultra proves it can hold its ground with the best in the business. Clocking in at 14 hours and 9 minutes, Samsung’s premium foldable comfortably outperforms the Google Pixel 10 Pro Fold<\/a> by a margin of 15.3%.<\/p>\n

Get instant access to breaking news, the hottest reviews, great deals and helpful tips.<\/p>\n

Galaxy Z Fold 8 vs Fold 8 Ultra vs Flip 8: Charging speeds<\/p>\n

Swipe to scroll horizontally<\/p>\n

Row 0 – Cell 0 <\/p>\n

Charging Speed (in 15 minutes)<\/p>\n

Charging Speed (in 30 minutes)<\/p>\n

Galaxy Z Fold 8<\/p>\n

43%<\/p>\n

70%<\/p>\n

Galaxy Z Fold 8 Ultra<\/p>\n

49%<\/p>\n

76%<\/p>\n

Galaxy Z Fold 7<\/p>\n

28%<\/p>\n

54%<\/p>\n

Razr Fold<\/p>\n

41%<\/p>\n

73%<\/p>\n

Pixel 10 Pro Fold<\/p>\n

28%<\/p>\n

58%<\/p>\n

Charging is another area where Samsung\u2019s new phones make noticeable gains \u2014 specifically with a bump to 45W wired charging across all three models. That\u2019s a welcome increase from the previous 25W cap, allowing them to juice up much faster in the same timeframe.<\/p>\n

The Galaxy Z Fold 8 Ultra leads the pack, hitting 49% in 15 minutes and 76% in 30 minutes. That\u2019s an impressive leap over the Z Fold 7\u2019s 54% mark, even outstripping the Motorola Razr Fold\u2019s 73%. The standard Z Fold 8 also impresses by reaching 70% in half an hour.<\/p>\n

Swipe to scroll horizontally<\/p>\n

Row 0 – Cell 0 <\/p>\n

Charging Speed (in 15 minutes)<\/p>\n

Charging Speed (in 30 minutes)<\/p>\n

Galaxy Z Flip 8<\/p>\n

35%<\/p>\n

59%<\/p>\n

Galaxy Z Flip 7<\/p>\n

29%<\/p>\n

55%<\/p>\n

Razr Ultra (2026)<\/p>\n

42%<\/p>\n

74%<\/p>\n

Meanwhile, the Z Flip 8 offers a slighter improvement over its predecessor, reaching 59% in 30 minutes compared to the Flip 7\u2019s 55% \u2014 a surprisingly modest gain given the wattage upgrade. While that still trails the Motorola Razr Ultra\u2019s blazing 74% charge result, Samsung\u2019s entire 2026 lineup comfortably outpaces rivals like the Google Pixel 10 Pro Fold (58%), ensuring less time tethered to a wall adapter.<\/p>\n

What to read next<\/p>\n

Galaxy Z Fold 8 vs Fold 8 Ultra vs Flip 8: Verdict<\/p>\n

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\"Samsung\n<\/p>\n

(Image credit: Tom’s Guide)<\/p>\n

If you weren\u2019t convinced already, I\u2019ll state it again: silicon-carbon batteries are making a massive impact \u2014 and Samsung\u2019s new foldables cement my sentiment. Foldable phones have come a long way, and battery performance is no longer one of their compromises.<\/p>\n

By introducing silicon-carbon battery technology alongside 45W wired charging, Samsung\u2019s 2026 Galaxy Z lineup delivers meaningful upgrades where it matters most and makes them solid best phone battery life <\/a>contenders. These improvements should translate to tangible real-world gains, powering you through a full workday without the constant need to top off.<\/p>\n

While Motorola continues to push the upper boundaries of battery life with its Razr series, Samsung\u2019s Galaxy Z Fold 8 Ultra stands out as the ultimate powerhouse, comfortably outlasting rivals like the Pixel 10 Pro Fold while charging faster than ever before. Whether you prefer a compact flip or an immersive book-style screen, you can finally enjoy foldable productivity without constantly watching your battery level.<\/p>\n

<\/p>\n

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Follow Tom’s Guide on Google News<\/a> and add us as a preferred source<\/a> to get our up-to-date news, analysis, and reviews in your feeds. <\/p>\n

More from Tom’s Guide<\/p>\n","protected":false},"excerpt":{"rendered":"As much as I rave about the extra utility that the best foldable phones have over traditional slabs,…\n","protected":false},"author":2,"featured_media":710415,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[2306,86,56,54,55],"class_list":["post-710414","post","type-post","status-publish","format-standard","has-post-thumbnail","category-mobile","tag-mobile","tag-technology","tag-uk","tag-united-kingdom","tag-unitedkingdom"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/710414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=710414"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/710414\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/710415"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=710414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=710414"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=710414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}