A few weeks back I upgraded finally from iOS 10 to 11 (I got an Apple Watch so had no choice if I wanted to use it). Ever since then, my battery life has gone to crap on my iPhone SE. The worst culprit is apparently Siri. I've found other questions such as this one dealing with the same thing, but the proposed solution seems to be inconclusive since others have the same problem with different "solutions", and also I actually use the suggested apps quite often so don't want to disable them anyway.
Why on earth is Siri suddenly consuming so much battery since upgrading, and what can I do about it? Is it related to Siri use on the Watch? I do use Siri there quite a lot as it's extremely convenient, but it's not like I dictate books or something... just the odd short iMessage or Skype reply.
EDIT: After disabling Hey Siri for a couple of days, my battery drain has slowed way down and Siri is only a very small part of it. I'm not convinced however that this is actually the culprit however because this had never happened before. I've turned it back on now and will see if anything changes again.