Question about Huawei AP81 Super Charge

Charging should be absolutely no problem. However, in the picture it looks like a USB C connector as far as the cable is concerned. As far as I know, the Mate 8 still has the old connector. You would then simply have to use a different cable. The Supe Charge function won't be much use with the Mate 8 either, as it is only supported from the Mate 9 onwards. I think you are better off with a cheaper charger with 2A or more :)