Hi, I just bought an SP3 with Windows 10. What is the average battery life most users with similar device get for daily use? Mine is updated to the latest firmware already. Last testing I got is like these (25% screen brightness, wifi on, time is measured from 100% battery until it shuts down by itself around 5% battery life): 1) 5.5 - 6.5 hours battery life for normal office use (using excel, words, check email, 1/2 hour online video) 2) 5 - 5.5 hours battery life for non stop youtube video/online video Are those numbers normal or is it considered as short battery life? The reason I asked is because when I watch/read reviews of SP3 with Windows 8, many reviewers said that they got 7-8 hours even with heavy use. If mine is defective, I'm thinking to exchange it before the exchange period is over. Thanks in advance.