The results were quite surprising

Surprising with the battery consumption table of the Galaxy S26 Ultra when the device reaches an average of 42 minutes of use for every 10% battery in automatic brightness conditions.

Surely when holding the super product Galaxy S26 Ultra, the thing you care about most besides the thin and light design or the Snapdragon 8 Elite Gen 5 chip is the battery life. Samsung continues to maintain the 5,000 mAh battery for this year’s generation, a number that has been familiar since the Galaxy S22 Ultra.

With the new optimizations from One UI 8.5 and the 3nm chip process, can this “giant” do anything? I installed the SIM and experienced it for 4 consecutive days to get the most objective answer.

Buy Galaxy S26 Ultra with good battery performance all day long:

Mixed-use experience

During the test, I used the device for basic tasks: surfing social networks (especially Reels on Instagram), texting Zalo, reading newspapers and taking a few photos. I don’t play games and don’t use the device as a 4G hotspot.

A big plus point is that even though the body is thinner and lighter, the feeling of holding it when used continuously is very comfortable. The results show that on average, for every 10% battery, I will have about 42 minutes of screen brightness. With moderate usage, it is completely feasible to unplug the charger early in the morning and use it until late at night without having to worry about finding an outlet.

Actual Galaxy S26 Ultra battery consumption log table

To make it easier to visualize, I have recorded detailed battery consumption during 4 days of experience (new device with 100% battery health):

Note: The above results were performed at auto brightness and are mainly used in indoor environments (Wi-Fi).

The paradox between On-screen time and standby consumption

There is an interesting and surprising point that I realized: On Monday, although I used the device very little (only 1 hour 21 minutes On-screen), the battery drain rate was much faster than other days (only 2.8 minutes for 1% battery). This shows that background processes or push notifications still consume a certain amount of energy even when we are not looking at the screen.

However, on heavier usage days like Tuesday, the device lasted nearly 5 minutes for every 1% of battery. On average, the Galaxy S26 Ultra can last for nearly 7 hours of continuous screen brightness on a 100% full charge.

Compare with competitors and future expectations

If put on the scale with many competitors in the same segment, Galaxy S26 Ultra still has a gap to fill in terms of power optimization.

While other competitors have started the 6,000 – 7,000 mAh battery race, Samsung persists with the 5,000 mAh mark to keep the device slim and delicate.

However, with super fast charging technology and the new chip’s cool temperature management ability, the S26 Ultra still fights durably, more than capable of meeting all high-intensity work and entertainment needs.

Conclude

The Galaxy S26 Ultra may not bring a breakthrough in physical battery capacity, but software optimization has helped the device have a very stable and reliable usage time. If you are not a “gamer” who plows through the night, the Galaxy S26 Ultra’s battery will definitely not disappoint.