https://www.techradar.com/news/the-iphone-x2-could-make-it-harder-to-run-out-of-battery

If you're regularly running out of charge on your iPhone X, then chances are you're getting used to the need to constantly power it back up.

The good news is that Apple might be trying to do something about that, giving you more power in less time... and without having to spend money on a new accessory.