So I've had the Retina Macbook since launch and continuously achieved near 10 hours on a full charge. Now I'm getting 3.5-4 hours. I've applied every update and I'm running the latest public build of El Capitan. I've attached screenshots from my activity monitor. The battery indicator blames Safari. I have one window open with 5 tabs and Safari isn't a problem according to Activity Monitor. I've had 5 windows with 40 tabs open before and still got great battery life. What should I do?