Sales of the Galaxy S26 series have not yet started. The reviewer that tested the Galaxy S26 Ultra against other high-end flagships to determine whether the newcomer’s 5000mAh battery still stands up is the source of this battery comparison. If any of these phones are on your shopping list, you should definitely have a look at the intriguing results.
The latest battery update for Samsung’s Ultra smartphones was five years ago. In 2020, the capacity of the outdated S20 Ultra was increased to 5,000 mAh. In 2026, Samsung set a new battery maximum of 5000mAh for the Galaxy S26 Ultra.
Chinese manufacturers have surpassed the standard flagship battery size of 7,000 mAh. The data clearly reveal that Samsung’s new Ultra model is having trouble competing with those 7000mAh phones, and the battery PTSD from the Note 7 days is still holding them back.
The Galaxy S25 Ultra was fully depleted after 8 hours and 40 minutes of testing, according to TechDroider’s YouTube video. With combined usage (browsing, gaming, video streaming, and camera usage), the new Galaxy S26 Ultra actually clocked out at 9 hours and 8 minutes.
This year, the phone’s endurance was minimally improved by chipset efficiency and One UI enhancements. In actuality, the 4,823 mAh iPhone 17 Pro Max lasted 9 hours and 41 minutes before expiring. Additionally, Xiaomi’s 17 Pro Max model (7,500 mAh) was able to run continuously for ten hours.
The OnePlus 15, the world’s current battery champion, was also tested by the YouTuber. It continued until twelve hours and thirty-one minutes had passed. With a 7,300 mAh battery, this gadget easily outperforms the Galaxy S26 Ultra in terms of physical capacity by 30–40%.
The battery performance of the Galaxy S26 Ultra is dwarfed by these statistics. For upcoming phones, the firm did indicate that they are switching to the Si/C approach. in order to introduce larger batteries without the bulk. We’ll find out soon if that’s the case. For updates, keep an eye on the news.