If you only read this forum, you'd think that the Surface Pro 4 could only just barely get 4-5 hours of battery life. To convince both myself and you that I'm actually getting closer to 7+ hours, I decided to start intentionally using battery even if I could be plugged in while actively tracking how much battery time I can get out of my SP4. Today, I had a really long day at work so I had lots of time to just keep my device active while I did some work or just surfed the web in between things I had to do. I took my device off charger at 5:00 pm and then mostly did light tasks on it including having 1-5 tabs open in Chrome, editing a Word document, checking email, using Photoshop to save some screenshots, watching Youtube, and listening to music. I have the screen set to 25% adaptive brightness (the "darker" preset), and I'm not using any tweaks. The summary of this day can be found in the following picture where, after 6h11m of on-time, I was down to 32% battery. There was a little over an hour of connected standby time (WiFi enabled) so we can round my on-time to an even 5 hours. This gives a projected total battery life of 7.4 hours. While I have your attention, I had a hypothesis about why some people are only getting 4-5 hours on their devices: are any of you using additional anti-virus/malware/spyware scanning programs? Edit: Core i5, 8 GB, 256 GB.