The Samsung Galaxy S8 with a 3000 mAh battery needs a full charge of about 100 minutes, thanks to Adaptive Fast Charge. However, you must know that your smartphone does not support high-speed charging with the screen turned on, which Samsung does not officially inform.
It is difficult to underestimate the benefits of the quick charge feature, so that our smartphone does not need to be plugged into the charger for several hours, especially when it comes with a capacious cell. Fast loading supports Samsung Galaxy S8, however, turns out not in every situation. The Samsung Adaptive Fast Charge does not work with the screen turned on , as the Phandroid editor has shown. Thus, the charging time is longer and instead of 104 minutes, the Galaxy S8 needs 178 of them. The ZTE Blade V8 Pro, which supports dual-core Quick Charge 2.0 technology and a similar battery, requires 92 minutes to fully charge when the YT movie is turned on. For Samsung this is not news, because both Galaxy S6 and Galaxy S7 also did not support Adaptive Fast Charge with screen turned on. The difference is that, in their case, Samsung officially informed about this. On its website. Meanwhile, the Galaxy S8 does not have this information, so unaware users may be concerned about the fact that the screen is loaded longer. It's hard to call it a drawback, but it's worth knowing about it . Source: Phandroid