Apple iOS 13 will improve battery life with optimized battery charging
Apple iPhone With iOS 13 Meant to Fix Short Battery Life Over Time
iOS 13 Battery Life Saving Tips for iPhone and iPad [Guide]
Severe battery drain after updating my iPhone SE to iOS 13. 52 minutes of use, 50 in Pokémon GO completely drained my battery. iOS or Pokémon problem? : r/TheSilphRoad
Despite the space vacated by the notch, iPhone 13 has no battery percentage | iMore
How to show iPhone 13 battery percentage - 9to5Mac