Well, to my surprise it supports 18W fast charging! At the time of buying, I was sceptical whether it’ll support 18W charging with my Poco F1 charger as it’s a connector type cable and the wire itself isn’t much thick as compared to the cable I got in box with my Poco F1, but it really does! I charged my 20000 mAh Mi 2i Powerbank and it took 6 hours to fully charge with the 18W charger, whereas it took 10 Hours with my 10W adaptor using this cable in both the scenarios, hence proving the first line of this review! The connector junction is quite durable and won’t break easily for sure (I was also hesitating to buy because of this reason).