2. Test on standby
In addition to the system taking a while to really finish transferring everything over, we also tend to spend a long time playing with new features. This year that’s especially true with 3D Touch, Live Photos, and more. And if you’re playing with new features, the screen is lit up, the radios and broadcasting, and power is draining. In other words, if you’re battery feels like it’s only lasting half as long, the first step to fixing it is figuring out if you’re using it twice as much.
So, note down how much battery life you have left. Then put your device down for 20-40 minutes. When you pick it back up, note down how much battery life you have left again. If there isn’t a big change while in standby, you’re probably okay, and your battery life will return to normal when your usage returns to normal (after the novelty wears off).
If your device continued to drain and drain fast, even when you weren’t using it, keep reading!