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In a series of battery life tests where multiple smartphone models from the past few years were set at the same brightness and forced to reload the same sites, newer smartphones were not able to last as long as older devices.
When it comes to the iPhone, for example, the iPhone XS died an average of 21 minutes earlier than the previous-generation iPhone X. Battery life impact was most noticeable with the Google Pixel 3, which lasted an hour and a half less than the Pixel 2.
According to The Washington Post, the iPhone XR, which uses an LCD instead of an OLED display, was a notable exception, performing well on the battery life tests. The iPhone XR boasts the longest battery life of any iPhone with 25 hours of talk time, 15 hours of internet use, 16 hours of video playback, and 65 hours of audio playback.
It lasted the longest in the battery test, besting the Pixel 3XL, the Samsung Galaxy Note 9, and the iPhone XS Max.
Apple’s iPhone XR, the new phone I recommend to most people, has a different approach. It scales back on the screen tech — lower resolution, less bright and lower-quality color — in ways that benefit battery life tremendously: The XR lasted 3 hours longer than the top iPhone XS, even though the its screen is actually a smidge larger. (Bonus: It also costs $250 less.)
Nadim Maluf, CEO of battery optimization firm Qnovo, told The Washington Post that batteries improve at about “5 percent per year” but smartphone power consumption is growing faster than that.
The Washington Post consulted with other tech sites like Tom’s Guide and CNET, and came to the conclusion that high-resolution OLED displays and cellular connectivity are major factors that impact battery life.
Turning down display brightness and using WiFi when possible, two well-known techniques for preserving battery life, are among the site’s recommendations for eking more juice out of a smartphone.
The Washington Post‘s battery life test focused on the display, but other battery life tests, such as one conducted by Consumer Reports using a machine that opens up apps, had different results, with the iPhone XS beating the iPhone X due to improvements Apple has made with the processor.
Variations in battery life due to different tests and different real-life usage situations can make it difficult to tell whether overall battery life is increasing or decreasing over time, says the site.
Battery company Onavo’s CEO believes that consumers should “start getting ready for compromise,” settling for smartphones with increasingly bigger batteries that result in larger, heavier devices or lesser technologies like the LCD display in the iPhone XR.
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