iPhone 14 Battery Capacities For All Four Models Revealed Ahead of Launch

If you go into the phone settings, and look for battery health it will tell you how much of a charge it can hold relative to when it was new.

Apple doesn’t do grade or performance to get upgrade. That was just how the media spun it. The fact of the matter, is that Apple will degrade the phone performance because The battery can no longer support a peak voltage to the deliver full performance. As such, when doing something intensive like playing a game on your phone randomly shut down, because it wasn’t getting the power it was asking the battery to deliver. Before however Apple used to not tell you it was doing this, which was scummy. this is not the case anymore.

If you’re 12 doesn’t last a day anymore, pretty much almost 100% is due to the battery needing to be replaced. As for why would you wouldn’t assume that was the fact, I can’t answer that question. It’s more common knowledge now.

Might be worth getting a battery replacement in your case.

You should look in your battery health, you may be surprised.

/r/apple Thread Parent Link - macrumors.com