GamerCore
Android Enthusiast
Just wanted to give a heads up to anyone with a Galaxy S8 / S8+ who finds themselves short on time and needs to charge their device as quickly as possible: Fast Charging doesn't work when the screen is on.
This has actually been the case since the Galaxy S6, so it's not really anything new. The difference is Samsung used to note this limitation somewhat openly (either in fine print or with an *asterisk), but I couldn't find anything about it on the Galaxy S8.
So, I decided to put it to the test, drained my device to 0% and charged it using the included Adaptive Fast Charger -- while the screen was on -- until it hit 100%. Total time it took to charge the phone? 2 hours and 51 minutes. Yup. Slow as molasses. And we're not talking fast charging until 75% than trickle charging the rest of the way -- no. This was the entire time. Here's what I logged:
Projected charging time: 1hr 37min
10 min - 7%
20 min - 17%
30 min - 22%
40 min - 34%
50 min - 39%
60 min - 45%
70 min - 50%
80 min - 55%
90 min - 61%
100 min - 66%
110 min - 72%
120 min - 77%
130 min - 82%
140 min - 88%
150 min - 93%
160 min - 97%
170 min - 99%
171 min - 100%
Actual charging time (screen on): 2hr 51min
It'd be nice if Samsung actually warned you about this or mentioned it via a notification of some sort. In any case, should you ever find yourself in a tight spot, battery is running low on your device and you need to juice it up before heading out... DON'T USE IT WHILE IT'S CHARGING. You're welcome.
This has actually been the case since the Galaxy S6, so it's not really anything new. The difference is Samsung used to note this limitation somewhat openly (either in fine print or with an *asterisk), but I couldn't find anything about it on the Galaxy S8.
So, I decided to put it to the test, drained my device to 0% and charged it using the included Adaptive Fast Charger -- while the screen was on -- until it hit 100%. Total time it took to charge the phone? 2 hours and 51 minutes. Yup. Slow as molasses. And we're not talking fast charging until 75% than trickle charging the rest of the way -- no. This was the entire time. Here's what I logged:
Projected charging time: 1hr 37min
10 min - 7%
20 min - 17%
30 min - 22%
40 min - 34%
50 min - 39%
60 min - 45%
70 min - 50%
80 min - 55%
90 min - 61%
100 min - 66%
110 min - 72%
120 min - 77%
130 min - 82%
140 min - 88%
150 min - 93%
160 min - 97%
170 min - 99%
171 min - 100%
Actual charging time (screen on): 2hr 51min
It'd be nice if Samsung actually warned you about this or mentioned it via a notification of some sort. In any case, should you ever find yourself in a tight spot, battery is running low on your device and you need to juice it up before heading out... DON'T USE IT WHILE IT'S CHARGING. You're welcome.
