I've had this new iPhone SE (2020) for a few months now and noticed the battery life seems to drain faster than expected. Even when I was asleep it seemed the battery would drain fast. I also noticed the data icon was spinning very often. I even keep "low power mode" on and battery seems to drain faster than you'd expect.
I tried uninstalling many apps but that didn't seem to change anything. Then I tried removing the weather widget (and spotify widget) on the home screen. After that the data spinner is a lot less active.
I think the weather widget was very often causing network activity which was draining the battery slow and steady.
Since I remove the weather widget (and spotify widget) I feel my battery life is more stable now and does not drain as fast.
