Galaxy S21 Ultra batterylife is great, but there’s a catch: Samsung has equipped its latest Galaxy S21 phones with big batteries and more efficient 5nm processors. Based on our testing, you’ll see mixed results depending on which model you buy.The 6.8-inch Galaxy S21 Ultra performed well, lasting nearly 11.5 hours on a single charge in our battery test, making our list of the best phone battery life. Both the 6.7-inch Galaxy S21 Plus and 6.2-inch Galaxy S21 didn’t fare so well, running out of juice before 10 hours. That’s about average for smartphones.Best phones: Samsung’s new devices rankedHow the Galaxy S21 Ultra differs from the Galaxy S20 Ultra We test Galaxy S20 Ultra batteries by taking out a fully charged phone and setting its display brightness to 150 nits. We then let the phone surf the web over a cellular connection until it ran out of juice and timed the results. Let’s take a closer look at how the Galaxy S21, Galaxy S21 Plus, and Galaxy S21 Ultra performed in our testsEven if the battery capacity hasn’t changed, you’ll see some improvements, as the Snapdragon 888 chipset powering the new phones should be more efficient than last year’s chipset.We definitely saw this with the Galaxy S21 Ultra, which lasted 11 hours and 25 minutes in our Galaxy S21 Ultra battery test.galaxy s21 battery life There’s one caveat about the S21 Ultra’s results — we got it by turning off the phone’s adaptive display, which means the display’s refresh rate was at 60Hz. One of the big features of the S21 series is the adaptive display, which adjusts the refresh rate based on the task you’re performing.
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