Windows 10 has got a new preview build for the update due in the first half of next year (20H1) which introduces some smart features for the Your Phone app, as well as bringing in a Windows Hello PIN login for Safe Mode.
With the new build 18995, Your Phone is being considerably bolstered (again) with a new battery indicator being presented within the app that shows you the current level of charge in your phone. So if your mobile happens to be elsewhere, you don’t need to get up and look at the device to know when it’s finished charging.