Two questions on battery consumption: 1. My phone used up 5% of my battery in 15 minutes. Is this considered normal usage or excessive usage generally? I am concerned because based on that statistic, the phone will use 20% in 1 hour and I can have a maximum of 5 hours of battery life without charging. That is not helpful if I'm outdoors. I'm asking in general, I know it's subjective, for that 5% usage in 15 minutes which I've observed, I was reading a ebook through MoonReader, have data, wifi, bluetooth, location, background data, etc all turned off, no other user app running and phone is the Samsung Galaxy S7 Edge. 2. If the 5% usage in 15 minutes is excessive, does the UHD display contribute to its excessive battery usage? If yes, should I switch from a UHD to 1080p HD phone to reduce battery usage?