iPhone 16 Pro Max battery draining quickly after iOS updates

Nobody here cares if your next phone is an Android. You don't have to look to hard on the Android Support Forum for people who say their next phone is going to be an iPhone. It really makes no difference to us.

If you were looking for support you would have provided the 2 battery graphs and the top 5 apps consuming your battery at Settings > Battery > View All Usage. That would be what is needed to identify what is consuming your battery. Any Meta apps? Those have been identified as high battery consumers where even Google called them out for the amount of battery being used on Android devices.

Once again, charge your phone all night, every night and use Optimized Charging. Otherwise you are just wasting your charge cycles and the battery will suffer the consequences, especially if you are letting it run down to nothing over several days.

Please listen to what Lawrence Finch provided. You are most definitely not doing your phone any favors in how you are charging (or not charging) it. Apple has never suggested an iPhone has a 48 hour battery. Just about every senior member on this forum, with years of experience, plug our phones in to charge when we go to bed at night, with Optimized Battery Charging on and we leave our phones on charge ALL night EVERY night. You are instead making your battery work the hardest it can, which ultimately will reduce Battery Health faster.

As to what you choose to buy in the future, we are not bothered in any way if you choose an Android as your next phone. If you think Android has better battery management (they don't, by the way), you should definitely choose the phone that best meets your needs. If you thought you were telling Apple this, you aren't. This is a user to user only forum, which Apple neither participates nor reads for user feedback.

Your are not using charging best practices. You should charge the iPhone overnight, every night, with Optimized Charging enabled. There is ZERO benefit to seeing how long you can go between charges; doing so shortens the useful life of the battery because the phone never runs on mains power, so the battery is doing 100% of the work of the iPhone. When you charge overnight that’s 8 to 10 hours when the battery isn’t doing anything.

Believe it or not, Androids do not get better battery life than iPhones. Especially if you try to squeeze every last drop out of the battery before charging.

See:When to charge your iPhone or iPad | Communities