I just bought a brand new Surface 2. I have been experiencing really poor battery life. The battery drains in just 3-4 hours from basic web-browsing and watching videos. I have installed all Windows updates. The Touch Cover is plugged in 100% of time. From powercfg/sleepstudy i can see that an "Unregistered Device SE" is the main problem and it is 100% active. I have encountered many threads with this problem but many of them were really old and no real solution was there. I'm really new in using Windows 8.1 RT so any help would be appreciated. I'm more than happy to give more information of situation if needed.