Samsung Galaxy Fold 8 and Fold 8 Ultra battery and charging: Everything we know so far
Big upgrade compared to previous Samsung foldables, but just catching up if you compare to Chinese brands.
Image by OnLeaks and Android Headlines
Samsung's next foldable phones are right around the corner, expected to debut on July 22nd, and this year, we are getting two book-style foldables instead of just one.
Last year, Samsung upped the ante with the Galaxy Z Fold 7 — a super thin phone with stunning design and a slightly wider cover screen that made using it closed much easier.
This year, the successor will be named Samsung Galaxy Z Fold 8 Ultra, its first increase in rank to "Ultra".
We also expect to see a Samsung Galaxy Z Fold 8, with no suffix, and this model will have a passport-like size, with a much wider cover screen. When unfolded, the Fold 8 will feature a 4:3 aspect ratio rather than the nearly square format of the Fold 8 Ultra.
But what does that mean for battery life? Which of the two will have the bigger battery?
Galaxy Fold 8 and Fold 8 Ultra battery size leaks and rumors
Fold 8 on the left and Fold 8 Ultra on the right | Image by Bizarre Red Oil Party on Weibo
After multiple leaks, we now know with near certainty that the Galaxy Fold 8 Ultra will have a 5,000mAh battery, a 13% improvement over the Fold 7.
Allegedly, Samsung has decided that adding a fraction of a millimeter won't hurt the super slim design, while users will appreciate the big bump in battery life. I agree, that's a very reasonable move.
The passport-style Fold 8 is expected to feature a slightly smaller, 4,800mAh battery. This is still a very respectable size for a foldable.
And what about the competition?
The current Google Pixel 10 Pro Fold also features a roughly 5,000mAh battery, so the Galaxy Fold 8 Ultra will match it.
Among the options you cannot buy in the United States, you have Chinese foldable phones that typically have an advantage in battery size. For example, the Oppo Find N6 comes with a 20% bigger battery at 6,000mAh.
There are still no passport-style foldable phones from other companies, so there is little to compare the Fold 8 to.
The upcoming iPhone Ultra, which will also adopt a passport-like design, is expected to feature a battery size above 5,000mAh, but the actual number is not certain yet. The last specific number we heard there was way back in November 2025, when leaker account "yeux1122" on the Korean Naver blog claimed Apple is testing a battery in the 5,400–5,800 mAh range.
Galaxy Fold 8 and Fold 8 Ultra charging leaks and rumors
Fold 8 charging speeds revealed in Chinese 3C certification | Image by Screenshot from Chinese 3C database
Wired charging on the Fold 8 and Fold 8 Ultra is rumored to max out at 45W speeds, which is excellent for a foldable phone, but not quite as fast as Samsung's non-foldable flagship, the S26 Ultra, which charges at 60W speeds.
The new 45W wired charging speeds are also a marked improvement over the 25W speeds supported on the Galaxy Fold 7 last year.
And compared to the competition, Samsung is clearly still conservative, even with the increase. The Motorola Razr Fold, for example, supports 80W wired charging, notably faster. The Oppo Find N6, Honor Magic V6 and Vivo X Fold 5 all support 80W wired charging as well, but Samsung still wins the battle with Google as the Pixel 10 Pro Fold can only charge at up to 30W speeds.
Galaxy Fold 8 and Fold 8 Ultra wireless charging leaks and rumors
Dummy units of Fold 8 Ultra, Fold 8, and Flip 8 | Image by Sonny Dickson
We don't expect major changes to wireless charging though.
The Fold 8 and Fold 8 Ultra are expected to support 15W wireless charging.
One thing we are not certain of is whether there will be supprot for magnetic charging (Qi2). Some early Fold 8 and Fold 8 Ultra mockups were pictured with magnets on the back, but we don't seem to have reliable leakers confirm that, so let's wait and see. Even if there are no magnets on board, you can always use a case with magnets to snap the phones tightly to a Qi2 charger.
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