Check battery usage. Settings, Battery
Background App refresh. Settings, General, Background App Refresh
Turn off Cellular data. Settings, Cellular, turn off cell data
Wifi assist. Settings, Cellular, scroll to the bottom, turn on Wifi assist. This stops your phone from trying to stay connected to poor wifi signals.
Low power mode. Settings , Battery, manually turn on Low Power Mode.
To save more battery turn off Hey Siri listening. Settings, Siri and Search, turn off Listen for Hey Siri. With this on your phone will constantly listen for Hey Siri.
Video “How To – Save iPhone Battery Life” Author: Ted Leger