![]() Use the pure white calibration screen to set the device's screen brightness to a defined level, ideally 110 cd/m 2 for laptops and notebooks or 200 cd/m 2 for smartphones and tablets.Disable automatic screen brightness adjustment.Test the device at room temperature, away from direct sunlight and heat sources.Do not use the charging cable, or connect mobile devices to a PC, while the test is running. Battery testing can take several hours during which you will not be able to use your device for other tasks. The battery must be at least 80% charged before the test will start. The 50% brightness setting on one device may not be equal in luminance to the 50% setting on another device, for example. Different screens offer different levels of maximum brightness. It is not a good idea to calibrate the screen using the device's built-in brightness settings. Alternatively, place your devices side by side and adjust the brightness levels by eye. If you don't have access to a luminance meter, you can calibrate your devices by comparing the pure white calibration screen to a reference such as a monitor, light-box or similar. Our benchmarks can display a pure white calibration screen to help you set the screen brightness. In practice, this is difficult without expensive, specialist equipment. ![]() Ideally, you should calibrate every device you test to the same screen brightness. Screen brightness can have a significant effect on a device's battery life. The device manufacturer may provide special software to calibrate the battery. For better accuracy, we recommend two complete drain/charge cycles. You can calibrate a battery with a full drain/charge cycle followed by a couple of hours left connected to mains power. When a device is brand new, or is usually connected to a power supply and hasn't been discharged for a long time, or has been shut down and disconnected from power for a month or more, you must calibrate its battery before running the test. Make a note of these settings in order to compare devices fairly.įor Android smartphones and tablets, we recommend benchmarking battery life with PCMark for Android. You should use the Windows Power Plan settings that are shipped to and used by the end user. ![]() In these cases, it is necessary to run the benchmark multiple times, and then take an average or a mode of the results.įor Windows laptops, notebooks and tablets, we recommend benchmarking battery life with PCMark 10. There are also devices that simply do not offer consistent performance due to their design. Individual scores may occasionally fall outside the margin of error since the factors that influence the score cannot be completely controlled in a modern, multitasking operating system. This means that running a benchmark repeatedly on a consistently performing system in a well-controlled environment will produce scores that fall within a 3% range. The precision of UL Solutions benchmarks scores is usually better than 3%. For example, you should test every system in the same location, at room temperature, and away from direct sunlight and other heat sources. ![]() In general, you should benchmark every device you test under the same conditions. For Windows PCs, we recommend 3DMark for benchmarking gaming performance, PCMark 10 for benchmarking complete system performance, and VRMark for benchmarking VR performance.įor smartphones and tablets, we recommend 3DMark, a cross-platform benchmark for Android and iOS, and PCMark for Android. ![]()
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