Is the iQi PWRcase compatible with the iPhone 6S Plus?

Unfortunately the iQi PWRcase is only compatible with the iPhone 6 and 6s.

If you are looking for a way to make your iPhone 6s Plus Qi enabled you can use the iQi Mobile receiver, which can be found here: http://www.fonesalesman.com/collections/wireless-receivers-for-iphone-6s-plus/products/iqi-mobile