My SE same performance, battery life like day one. Always updated to the latest one whenever available.

My 7 and SE still perform like before. No battery issues.

Facebook is the culprit most the time. That, and its messenger. Most of fb users use desktop version, if they actually cared about their battery. I never use fb anymore since 2 years ago so my opinion might vary but thats what my colleagues are experiencing.

I turned on all those fancy stuff, and still same great battery life. I am on the regular iPhone 7 some more.

I did keep track the usage in the beginning of using the phone, with 10% of drop = 1 hour plus of usage~

I use Safari for most part cuz of the optimization in iOS, and an app if its available cuz browser always take more battery than app.

Chrome drains like crazy~

mcm lama xde update plak huhu~

One of the reason i love iOS is how well their auto brightness works. The transition is sooo seamless that i forgot about any settings about brightness.