The powerbank truly supports fast charging up until 22.5w(tried with someone else's phone) however I cant fully maximise the usage of it because of my phone's input(only accepts 15W). Also, with a full battery, it can charge up to 3 charges for my Samsung S10+. Besides, in term of design, it is super small(than most powerbanks out there) and its design is sophisticated plus with this kind of anti-slip feature it is super helpful. As a person who usually uses 20kmah powerbank, it rather feels so ...