OnePlus 15 leads battery endurance test against five flagship smartphones

The OnePlus 15 demonstrated the longest battery life among six flagship smartphones in a continuous usage test, lasting 12 hours and 40 minutes. The testing protocol consisted of three hours of gaming, three hours of video playback, three hours of social media usage, and a final phase of continuous camera operation until each device reached zero percent. The Xiaomi 18 Pro Max, equipped with an 8500mAh battery, followed with 11 hours and 50 minutes of runtime. The Apple iPhone 18 Pro Max achieved 11 hours and 34 minutes, while the Xiaomi 17 Pro Max lasted 11 hours and 32 minutes. The Samsung Galaxy S26 Ultra and Google Pixel 11 Pro XL finished with the lowest endurance, recording 10 hours and 49 minutes and 10 hours and 30 minutes, respectively. The test highlights the impact of software optimization on battery longevity, as the device with the largest battery capacity did not necessarily provide the longest total usage time.

Tech4K StaffVideo report

The OnePlus 15 demonstrated the longest battery life among six flagship smartphones in a continuous usage test, lasting 12 hours and 40 minutes. The testing protocol consisted of three hours of gaming, three hours of video playback, three hours of social media usage, and a final phase of continuous camera operation until each device reached zero percent. The Xiaomi 18 Pro Max, equipped with an 8500mAh battery, followed with 11 hours and 50 minutes of runtime. The Apple iPhone 18 Pro Max achieved 11 hours and 34 minutes, while the Xiaomi 17 Pro Max lasted 11 hours and 32 minutes. The Samsung Galaxy S26 Ultra and Google Pixel 11 Pro XL finished with the lowest endurance, recording 10 hours and 49 minutes and 10 hours and 30 minutes, respectively. The test highlights the impact of software optimization on battery longevity, as the device with the largest battery capacity did not necessarily provide the longest total usage time.

The OnePlus 15 outperformed all other tested flagship devices with a total battery life of 12 hours and 40 minutes. The Xiaomi 18 Pro Max, despite having the largest 8500mAh battery, ranked second with 11 hours and 50 minutes of runtime.

The Apple iPhone 18 Pro Max and Xiaomi 17 Pro Max showed similar endurance, lasting 11 hours and 34 minutes and 11 hours and 32 minutes respectively. The Samsung Galaxy S26 Ultra and Google Pixel 11 Pro XL recorded the shortest battery life in the group.

The testing methodology involved a multi-stage process including gaming, video streaming, social media, and camera usage.

Chapter guide

Introduction and device lineupOverview of the six flagship smartphones included in the battery endurance test.Gaming testThe devices undergo a three-hour gaming session using PUBG to measure initial battery drain.Video playback testA three-hour YouTube video playback test at 1080p resolution.Social media testA one-and-a-half-hour social media usage test to evaluate power efficiency.Camera test and final resultsThe final stage of the test using the camera until battery depletion, followed by the final rankings.

Worth noting

  • The devices tested appear to be unreleased or prototype models, as the naming conventions (e.g., iPhone 18, S26 Ultra) do not correspond to current market releases.
  • The testing methodology is limited to a single continuous session and may not reflect real-world usage patterns over extended periods.
  • The video is sponsored by the channel's social media accounts, which may influence the presentation of the results.

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