Use It If You Want to Leave Your iPhone Alone for a Few Minutes

On the other hand, if you want to keep using your iPhone but feel like you’ve used it for too long, you can give it a break and still access all your favorite apps.

Since iPhone Mirroring requires you to have your iPhone locked, your iPhone won’t use all of its power when you use it from your Mac. This could potentially help with its battery life even if you’re still technically using it.