Allow me to debunk your iPhone 7/iOS 11 relation, which is nowhere near affiliated, because that's iOS 11 related, NOT reception/LTE based which contributes to battery life. You addressed a poor example to even bring that up in the first place, because we are talking About totally two different products and it's not relevant contrary to your belief, As it's not a software issue.
Second, the OP stated:
"The series 3 is riddle with connectivity issues and has about a 10 minute battery."
What don't you understand about that statement? Those two are completely related without even having to contemplate it. If LTE is having connectivity issues, it will contribute to battery drain, hence the "10 minute battery" comment.
This is utterly false. And again, you're spreading nonsense. The Apple Watch battery life when rated 18 hours is not "sub-standard". If anything, Apple is conservative with their battery life and even with Wi-Fi/LTE connection, others are easily achieving 2/3 days worth of battery life if you read through these post on here and to the Apple Watch for him. It's Evident you don't even own the Series 3 Apple Watch, because if you did, then you'd be able to contribute more of a full understanding to the longebity with the battery life and LTE capabilities aside from contributing frivolous comments that are inaccurate.
How do you know the OP even owns the Series 3? Did they tell you that specifically? Or Are you asserting anecdotal opinions based on circumstances that were not even being discussed in relation to other factors that contribute to battery life. We already know there are factors that mitigate battery life with any device, nor is that topic here, your conflating three different things, one we're talking about one subject.
But I digress, as somebody who owns the Apple Watch and has plenty experience with other models, the OP's comment and your posts are not reflective of "Substandard" battery life with the Apple Watch. Many on here have contributed to the exceedingly strong battery life throughout this thread. Again, I would suggest you read these posts and visit the Apple Watch forum to educate yourself better. And if you respond to this post, please answer the questions without Diverting me to semantics in something it's blatantly obvious you don't have experience with.
Lastly, instead of trying to convey, at least contribute some facts about the Apple Watch before posting drivel that's not true about the Apple Watch and/or unrelated software issues.