I actually read each post here…
Lots of conflicting opinions — and duplicative, unoriginal snark! 🙈 Of the form:
🚫 📱 ❌ = ✅ 🔋
Truly surprised that no one mentioned one of the biggest battery savers — turning down brightness. One gets used to a less bright, less glaring screen very quickly.
Airplane Mode, which was mentioned, is, for those of us who don't need to be connected 24-7, a big boost, too.
From my old iPod Touch days, turning off Background Refresh and Location Services, which were both mentioned, are the other members of a good quartet.
Still, for those who want to go all-in on everything iPhone, and never have to fret about battery life, carrying around a supplemental battery pack is a good idea.