Video streaming battery rundown test methodology

View the Project on GitHub MicrosoftEdge/videotest

Video streaming battery rundown test methodology

Brandon Heenan
Program Manager, Microsoft Edge


We measured the time it took four identical Surface Book laptops to run fully through their batteries while streaming video. The results were recorded with a camera and a time lapse was made available publicly:

Battery tests on streaming video comparing Google Chrome, Mozilla Firefox, and Opera.

The results showed that Microsoft Edge (7:22:07) lasted:


Computer setup

The test was performed on four Surface Books (256GB disk, Core i5, 8GB RAM, integrated graphics) running Windows 10 (10586.318 th2_release). These computers were configured to the following settings, to increase consistency between measures and reduce tasks that may start during the measurement and interfere with the results, while still representing a realistic user setup:


The specific versions of the browsers tested were:

Browser Version
Edge Microsoft Edge 25.10586.0.0
Microsoft EdgeHTML 13.10586
“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586”
Chrome Google Chrome 51.0.2704.63 m (64 bit)
“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36”
Firefox Mozilla Firefox 46.0.1
Mozilla83 – 1.0
“Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0”
Opera Opera 38.0 38.0.2220.29
“Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36 OPR/38.0.2220.29”
Power saver enabled


While plugged in, each respective browser was navigated to and logged into the same account. The show “Nature: Animal Misfits” was queued and paused immediately on each browser. Each computer was verified to have brightness set to 75% (with ambient brightness disabled) and volume to 25%.


  1. Start recording with camera
  2. Unplug the power bar that all four devices are charging from, ensuring they switch to battery at the same time
  3. Immediately push play on all devices and start timing
  4. When there’s less than 5 min remaining in the show, manually use the seek control to reset all devices to the beginning
  5. Repeat until all devices have run out of battery, recording the time for each of them