Adjust Your Brightness
What consumes most of the battery on any device is the screen. Having a very large screen forces any smartphone to use more battery life to power it.
Fortunately, the iPhone SE doesn’t have any large-screen issues. Still, making your screen too bright when you don’t need it will drain your battery faster.
Using the Control Center, you can adjust your brightness down so you consume less battery and you can still see your screen without any issues.