I also have to charge my Droid Turbo 2 almost daily. This has happened over time and I figured it was the phone/battery was just getting old/worn out.
I began having the exact same issue with my Turbo 2 in July 2018. I assumed the issue was an old battery. Motorola sent me a refurbished Turbo 2 and it is behaving exactly the same.
While it could of course be one of my apps, I have tried shutting down various apps, etc. without success in finding the culprit. I downloaded one of the battery checking apps (GSam) and it seems to point at the 'phone radio'. But airplane mode does not make it significantly better so not sure how good a pointer that is either.