As has been said, CarPlay wireless does drain the battery some what, that is using an adaptor for the Leon or the inbuilt one I have on my new car.
I made myself a wireless charging pad by dissecting the one you can buy for the pre facelifted cars.
As for the Wireless CarPlay, its not 100% perfect, I bought 2, the CarLinKit from Amazon at like £100 I think, but I'd also had another on order. I paid express delivery but it just never got posted. Ended up in dispute with PayPal, and then they posted it the day before the PayPal limit.
Long Story short a friend bought that one off of me, but despite the different brand, they were in fact identical, just one had a different stamp.
I suspect the one I received late was the copy though.
There maybe newer brands out now, as it was 2-3 years ago I bought it.
As well as battery life just bare in mind, it takes longer to connect, probably 30-60 seconds. And then for most things its bang on.
However, for phone calls, some calls there would be a clear delay, enough to make calls awkward. However as I didn't like being on the phone whilst driving it never bothered me as I was usually stationary.
That being said, I experienced the same delay on the new BMW I have now on one call, so it may not be the adaptor at fault.
My previous posts in my old build thread...
Wireless Charger:
Damo what is the part number of your unit? My Sat Nav?
www.seatcupra.net
Can't find my old post about the wireless CarPlay oddly.
Edit found it:
I wanted to find out if it supports wireless android auto and apple carplay
www.seatcupra.net