Excessive battery drain on iPhone 7

Thanks for the reply. A couple of weeks ago, the 7 went to "No service" and would not function no matter what I tried. When I brought it to my carrier they said it was no longer supported.

The battery was replaced by Apple maybe a year and a half ago and was great, now it drains severely even in airplane mode w/everything else off.

I wouldn't doubt it about the carrier itself, although the guys at the store didn't even try to sell me anything and only made outside suggestions.

The battery health is at 85%. I had no problem with it until after the service stopped. I turned it on this morning and maybe after only an hour of music use it's already down from 100% to 43%. This would have hardly moved the needle 2 weeks ago.

Thanks for the reply Bob. Battery is at 85% capacity. Currently music is 84% bc it's really the only app I use. I did have wifi on today in airplane mode to see if there was a difference and Siri somehow came up in my pocket and used 8%. The rest is just setting and home and lock screen. I did see that people have said if the cellular searching was being a drain it would show up there, but it does not.