I got my new 2015 MBP 13" 3 days ago, and have been getting about 6.5 hours with just Chrome (3-6 tabs) and Activity Monitor running. No videos. That's not much better than what I was getting on my 5-year -old MBP. I know it can take a little while to get to full capacity, but this seems way too short a life for such undemanding use. Anyone else notice that, or do I have a bad unit?