Fast charging while the screen is on

[irock1985]

I was a bit surprised to see my charger light up green when I plug my phone in right now the green light on this charger means that it's fast charging. Samsung had disabled fast charging while the screen was on ever since the Note 7 debacle. So I was delighted to know that it's re-enabled at the moment

 

[CKwik240]

I never had any issues fast charging on my S8 with the screen on.

 

[irock1985]

I never had any issues fast charging on my S8 with the screen on.

It would say fast charging but it wouldn't actually be fast charging. Or at least not like when the screen was off.

 

[CKwik240]

My car dock uses a fast charger. As long as the phone stays cool, it charges pretty quickly. I'm usually displaying Pandora. While I haven't measured the charge times, I haven't noticed enough of a difference to care.

 

[Joemax Usermax]

On a (rooted) Note 4, you could enable screen-on-fast-charging with something like

echo 0 >/sys/kernel/fast_charge/screen_on_current_limit

in a boot script. I haven't rooted my S8 yet, nor do I have a S9, but maybe somebody might want to try.