I may have spoken too soon when I said the G2 may be draining my battery more than other lens do. After reading another post where someone mentioned GPS draining batteries I checked and found that GPS was on and active on my 6D. So, I've turned it off and will watch the battery power to see from this point on when using the Tamron 150-600 G2.
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.