As per my 5T's charger, output rating is 5v 0.5a. When I tried to charge the camera with my Samsung phone's charger (5v 2.0a), it didn't work. So, if your Xperia charger has the same rating as my Samsung's, it would not work. For your iPad's, check its rating. If it's 1a, it might work. You'll see a blinking orange light near the usb port if the charger's output rating is too high, otherwise, it should be okay.
Oh, and my charger says 100v-240v, check if you have the same, if you do, you don't need a transformer with it.
Good luck! :)