Ok so i've done the video play back test. If you are connected to your WiFi and Home Network streaming movies from your desktop with a balanced power settings and Bluetooth enabled. You get just over 5 hours of watching movies. But if you set to 30% display settings with the bluetooth off you get just over 6 hours of video playback. So reducing the display does help, but kinda reduces the quality of the screen.
But i'm not sure how the iCore 5 gets 9 hours of web browsing if we can only get about 6 hours with the Internet connection turned on of video playback. I guess i'll have to test that as well.
I'm not sure how much power does the Bluetooth consumes