It is common knowledge that if you really want to charge your phone as quickly as possible, it is a good idea not to use it at all while charging and not light up the display. For smartphones from Samsung, this rule applies twice as much. Foreign magazine Phandroid for he demonstrated that Galaxy S8 to Galaxy The S8+ does not support fast charging when the device's screen is on. And all this despite the fact that in the status bar and in the settings it is stated that the phone uses fast charging. However, it actually charges at a standard speed.
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Since Galaxy The S6 uses Samsung's Quick Charge feature, which it renamed Adaptive Fast Charging. And just like the flagship model of the time, the latest one suffers from the same limitation – the absence of fast charging while the screen is active. Ph.Dandroid he found out, that Galaxy The S8 with an inactive display will charge from a full discharge to 100% at a respectable rate 1 hour and 37 minutes. But if the screen was on the whole time while charging, then the phone charged for almost three hours, specifically 2 hours and 51 minutes. The server only tested the smaller one Galaxy S8 with 3000mAh battery. AT Galaxy S8+ will make the difference even more striking.
Of course, few people use their phone the whole time it's charging, especially if they charge it from 0 to 100%. Even so, it is still good to keep in mind that the phone uses fast charging only if you leave it lying still and do not, for example, play games on it the whole time.
Why Samsung limits fast charging only to the inactive screen is not clear for now. The most logical explanation is trying to make sure the phone doesn't overheat. During fast charging, the smartphone tends to heat up noticeably more. But regardless of what the main reason is, it's good to know that charging Samsung's flagship phones works best when they're at rest.
