The charging bank on the market, its specifications are calculated according to its capacity and its output power limit power. 1 watt is also 10 watts. It's usually very slow. Because its output power is about 10 watts, it does not belong to the fast charging bank, so it takes an hour to fill a mobile phone, if the phone's data cable and the phone itself comes with a flash charge function, it may only take more than 40 minutes.