If you've noticed a drop in the battery life of your iPhone lately, you can probably blame one of two things-both software-related. If you joined the iOS 18 beta program, a decline in battery life is normal. I've personally seen the battery life of my iPhone 15 Pro Max running iOS 18.1 beta 5 take a huge beating. On the other hand, I can use the Apple Intelligence features that Apple has released with the iOS 18.1 beta. I am looking forward to eventually returning to the stable iOS path and will hopefully get my long battery life back when I do..