We've put the Samsung Galaxy S21, S21 Plus and S21 Ultra to the test to see how their battery life holds up. Here are the results and how they compare to other leading phones.

In conclusion, while the Galaxy S21 Ultra has a larger battery, the iPhone 12 Pro Max’s superior software optimization allows it to last longer in battery life tests.

An early battery comparison between the Galaxy S21 Ultra, iPhone 12 Max, S20 Ultra, OnePlus 8 Pro, and Xiaomi Mi 11 shows promising results for Samsung.

Galaxy S26 Ultra leak suggests familiar battery and camera specs, indicating minor hardware upgrades for Samsung's next ...

A battery life test putting the iPhone 13 Pro Max and Galaxy S21 Ultra through the same ordeals shows the new iPhone is the undisputed winner.

The lineup includes three different variants of the phone in different sizes -- the Galaxy S21, Galaxy S21 Plus and Galaxy S21 Ultra -- each of which will have a different battery size.

Although the Galaxy S21 series is coming with pretty much similar battery packs as the Galaxy S20 series, we might still see significant improvements in battery life in the 2021 Galaxy S phones.

Samsung's Galaxy S21 and S21 Ultra improve upon last year's models, but their feature sets are still more bloat than value-add.

The Samsung Galaxy S22 Ultra lasts less time than the S21 Ultra, but it appears that the Adaptive mode makes very little impact.