OnePlus 15 leads in battery endurance test against five flagship smartphones

The OnePlus 15 demonstrated the longest battery life in a comparative endurance test, lasting 13 hours and 33 minutes. The testing protocol involved a continuous cycle of gaming, YouTube video playback, social media usage, and camera operation across six flagship devices. The Google Pixel 11 Pro XL was the first to deplete its battery, lasting 10 hours and 49 minutes. The iPhone 17 Pro Max and Samsung Galaxy S26 Ultra showed nearly identical performance, with both devices shutting down at approximately 11 hours and 4 minutes. The Xiaomi 17 Pro Max followed closely, lasting 11 hours and 39 minutes, while the iPhone 18 Pro Max lasted 11 hours and 40 minutes. The test also monitored device temperatures throughout the process, with the OnePlus 15 maintaining a relatively lower heat profile of 35.4 degrees Celsius at the end of its cycle, compared to the Xiaomi 17 Pro Max, which reached 38.1 degrees Celsius. These results highlight the varying power management efficiencies of the latest flagship chipsets and battery capacities.

Tech4K StaffVideo report

The OnePlus 15 demonstrated the longest battery life in a comparative endurance test, lasting 13 hours and 33 minutes. The testing protocol involved a continuous cycle of gaming, YouTube video playback, social media usage, and camera operation across six flagship devices. The Google Pixel 11 Pro XL was the first to deplete its battery, lasting 10 hours and 49 minutes. The iPhone 17 Pro Max and Samsung Galaxy S26 Ultra showed nearly identical performance, with both devices shutting down at approximately 11 hours and 4 minutes. The Xiaomi 17 Pro Max followed closely, lasting 11 hours and 39 minutes, while the iPhone 18 Pro Max lasted 11 hours and 40 minutes. The test also monitored device temperatures throughout the process, with the OnePlus 15 maintaining a relatively lower heat profile of 35.4 degrees Celsius at the end of its cycle, compared to the Xiaomi 17 Pro Max, which reached 38.1 degrees Celsius. These results highlight the varying power management efficiencies of the latest flagship chipsets and battery capacities.

The OnePlus 15 outperformed all other tested devices with a total battery life of 13 hours and 33 minutes. The Google Pixel 11 Pro XL had the shortest battery life, lasting 10 hours and 49 minutes during the test.

The iPhone 17 Pro Max and Samsung Galaxy S26 Ultra exhibited nearly identical battery performance, both lasting approximately 11 hours and 4 minutes. The Xiaomi 17 Pro Max and iPhone 18 Pro Max finished their battery cycles within one minute of each other.

The OnePlus 15 maintained a lower final temperature of 35.4 degrees Celsius compared to the Xiaomi 17 Pro Max at 38.1 degrees Celsius.

Chapter guide

Introduction and device lineupOverview of the six flagship smartphones being tested for battery endurance.Initial battery specificationsComparison of battery capacities, display resolutions, and refresh rates for all devices.Gaming testPerformance and battery drain during a three-hour gaming session.YouTube playback testBattery consumption during three hours of 1080p 60fps video streaming.Social media testBattery drain during one and a half hours of Instagram usage.Camera usage testFinal battery drain test using the camera until all devices shut down.Final resultsSummary of total battery life and final device temperatures for each smartphone.

Worth noting

  • The devices tested are unreleased, and the results may not reflect the performance of final retail units.
  • The methodology relies on a single, non-standardized test cycle that may not represent real-world usage patterns.

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