{"id":675739,"date":"2026-09-06T19:12:33","date_gmt":"2026-09-06T19:12:33","guid":{"rendered":"https:\/\/www.europesays.com\/ie\/675739\/"},"modified":"2026-09-06T19:12:33","modified_gmt":"2026-09-06T19:12:33","slug":"iphone-ultra-battery-heres-what-we-know-so-far","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ie\/675739\/","title":{"rendered":"iPhone Ultra battery: here’s what we know so far"},"content":{"rendered":"

Everything about the iPhone Ultra<\/a> is going to be scrutinized under a much larger magnifying glass, so Apple can\u2019t afford to gloss over some of the foldable\u2019s biggest rumored features. One of the greatest areas of concern centers on battery life, given that it\u2019s tipped to become the thinnest iPhone ever.<\/p>\n

Delivering all-day endurance in a foldable is notoriously difficult, especially when you factor in that these devices have expansive main displays compared to traditional slates. I\u2019ve tested many of the best foldable phones<\/a>, and our lab testing reveals the obvious: battery life remains a major area of opportunity.<\/p>\n

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Knowing that Apple needs to strike a careful balance between battery endurance and a thin, lightweight construction, I\u2019ll break down all the leaks and rumors surrounding the iPhone Ultra\u2019s battery \u2014 while examining what its main rivals offer in terms of stamina.<\/p>\n

Latest Videos FromTom’s Guide<\/p>\n

Split battery design<\/p>\n

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\"iPhone\n<\/p>\n

(Image credit: AppleTrack)<\/p>\n

Based on regulatory filings<\/a> released back in July and shared by leaker Digital Chat Station<\/a>, Apple could be leaning toward a dual-cell split battery design for the iPhone Ultra to evenly distribute weight across its folding chassis. The configuration revealed in the filings pairs a 1,921 mAh cell with a larger 2,962 mAh one, bringing the total combined rated capacity to 4,883 mAh.<\/p>\n

Unlike many of its rivals, Apple isn\u2019t planning to bank on silicon-carbon battery tech<\/a> to power its upcoming foldable. While competitors leverage high-density silicon anodes that allow them to cram massive capacities into their foldables without adding bulk to their frames, Apple’s decision to stick with conventional lithium-ion cells means the iPhone Ultra won’t lead the pack in raw capacity.<\/p>\n

You may like<\/p>\n

Swipe to scroll horizontally<\/p>\n\nRow 0 – Cell 0 <\/td>\n\n

Battery Size<\/strong><\/p>\n<\/td>\n\n

Thinness<\/strong><\/p>\n<\/td>\n<\/tr>\n\n\n

iPhone Ultra<\/strong><\/p>\n<\/td>\n\n

4,883 mAh (rumored)<\/p>\n<\/td>\n\n

4.5 \u2013 4.8 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Samsung Galaxy Z Fold 8<\/strong><\/p>\n<\/td>\n\n

4,800 mAh<\/p>\n<\/td>\n\n

4.5 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Samsung Galaxy Z Fold 8 Ultra<\/strong><\/p>\n<\/td>\n\n

5,000 mAh<\/p>\n<\/td>\n\n

4.1 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Motorola Razr Fold<\/strong><\/p>\n<\/td>\n\n

6,000 mAh<\/p>\n<\/td>\n\n

4.7 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Google Pixel 11 Pro Fold<\/strong><\/p>\n<\/td>\n\n

4,806 mAh<\/p>\n<\/td>\n\n

4.8 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Oppo Find N6<\/strong><\/p>\n<\/td>\n\n

6,000 mAh<\/p>\n<\/td>\n\n

4.21 mm<\/p>\n<\/td>\n<\/tr>\n\n\n

Honor Magic V6<\/strong><\/p>\n<\/td>\n\n

6,660 mAh<\/p>\n<\/td>\n\n

4 mm<\/p>\n<\/td>\n<\/tr>\n

The chart above highlights the disparity in raw capacity the iPhone Ultra faces against its main rivals. At 4,883 mAh, the iPhone Ultra would lag near the bottom of the pack, eclipsing only the Galaxy Z Fold 8<\/a> and Pixel 11 Pro Fold<\/a>. On the other end of the spectrum, the Motorola Razr Fold<\/a>, Oppo Find N6, and Honor Magic V6<\/a> all boast capacities of 6,000 mAh or more.<\/p>\n

Battery life is a big concern<\/p>\n

Swipe to scroll horizontally<\/p>\n\nRow 0 – Cell 0 <\/td>\n\n

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

Battery Size<\/strong><\/p>\n<\/td>\n<\/tr>\n\n\n

iPhone Ultra<\/strong><\/p>\n<\/td>\n\n

N\/A<\/p>\n<\/td>\n\n

4,883 mAh (rumored)<\/p>\n<\/td>\n<\/tr>\n\n\n

Samsung Galaxy Z Fold 8<\/strong><\/p>\n<\/td>\n\n

12:20<\/p>\n<\/td>\n\n

4,800 mAh<\/p>\n<\/td>\n<\/tr>\n\n\n

Samsung Galaxy Z Fold 8 Ultra<\/strong><\/p>\n<\/td>\n\n

14:33<\/p>\n<\/td>\n\n

5,000 mAh<\/p>\n<\/td>\n<\/tr>\n\n\n

Motorola Razr Fold<\/strong><\/p>\n<\/td>\n\n

14:44<\/p>\n<\/td>\n\n

6,000 mAh<\/p>\n<\/td>\n<\/tr>\n\n\n

Google Pixel 11 Pro Fold<\/strong><\/p>\n<\/td>\n\n

12:31<\/p>\n<\/td>\n\n

4,806 mAh<\/p>\n<\/td>\n<\/tr>\n

I\u2019ve already mentioned how foldables don\u2019t have the same level of endurance as traditional flagship models, but they are making dramatic improvements. Our own lab testing results show that the landscape is shifting rapidly for notebook-style foldables, raising the stakes for the iPhone Ultra.<\/p>\n

Sign up to the Tom’s iGuide weekly newsletter with coverage on everything from product launches to software updates, this is your go-to source for the latest updates on all the best Apple content.<\/p>\n

Looking at the Tom\u2019s Guide battery drain test \u2014 which involves having a device continuously surf the web over cellular at 150 nits of screen brightness until depletion \u2014 you can see how larger battery capacities inherently deliver longer battery life in the chart above.<\/p>\n

Leading the pack is the Motorola Razr Fold at 14 hours and 44 minutes<\/a>, with the Galaxy Z Fold 8 Ultra not too far behind at 14 hours and 33 minutes<\/a>. I think we have a good indication of where the iPhone Ultra could land based on the Galaxy Z Fold 8 and Pixel 11 Pro Fold’s performances.<\/p>\n

If the iPhone Ultra does indeed end up packing a 4,883 mAh battery, I suspect it’ll clear the 12.5-hour hump with ease \u2014 and possibly land closer to the 13-hour mark. While that would still fall short of the leaders, it will come down to something else entirely to prove that the iPhone Ultra is a legitimate endurance contender.<\/p>\n

What to read next<\/p>\n

A20 Pro could have the biggest impact<\/p>\n

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\"Apple\n<\/p>\n

(Image credit: Apple\/Tom’s Guide)<\/p>\n

I know firsthand that size is only one part of the equation because I only need to look at the devices topping our best phone battery life<\/a> guide to be reminded of that. Despite leaks and rumors indicating that the iPhone Ultra will have a much smaller battery capacity than its rivals, endurance will ultimately come down to the efficiency of what’s running under the hood. Specifically, I\u2019m referring to the rumored A20 Pro chip<\/a>, reportedly built on TSMC\u2019s next-generation 2nm architecture.<\/p>\n

The A20 Pro could represent Apple\u2019s biggest efficiency leap in years. Moving down to a 2nm architecture doesn\u2019t just promise a performance bump \u2014 it should drastically slash power draw across the board. That advantage will be critical for balancing the heavy power draw demanded by the iPhone Ultra\u2019s dual displays.<\/p>\n

If Apple can optimize power delivery to key hardware components, the iPhone Ultra could significantly stretch its endurance between charges. Given the sizable battery life gains between recent flagship generations, the A20 Pro might just defy everyone’s expectations (including mine). While matching the 14+ hour times posted by rival foldables seems far-fetched based solely on a 4,883 mAh cell, the raw efficiency of a 2nm silicon could easily bridge the gap.<\/p>\n

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