Why Safari is consuming so much battery? From last 2-3 weeks I started noticing that my iPhone is consuming more battery than usual, around two to three times more.  When I looked at battery consumption details I found out that Safari is consuming too much battery. And this is happening consistently from last 2-3 weeks when I don't even use safari very much. As an example take a look at image attached, for 12 minutes of screen time it consumed 73% of battery. Why?

iOS version: 9.2.1

Phone: iPhone 6

Safari: latest available version
I had this same problem for the first after updating my iPhone 6s to iOS 11. I wasn't using Safari as I use Chrome but it would consume up to 50% of my battery and I was having to charge more frequently then before.

The solution was to disable iCloud syncing for Safari:
Settings → Apple ID → iCloud and turn off Safari.

My phone is now behaving 'normally'.