My Galaxy S9+ (SM-G965F/DS) only fast charges when screen is off?

[fuzzybabybunny]

I've got a SM-G965F/DS and it only appears to fast charge when the screen is off.

I have an inline USB current meter and here are my readings:

QC 3.0 port:
Screen off: 9V @ 1.333A = 12W
Screen on: 5V @ 0.5A = 2.5W

Standard USB port:
Screen off: 5V @ 1.8A = 9W
Screen on: 5V @ 1.2A = 6W

This is done with two different chargers and different cables.

Anker QC 3.0 Battery Bank:
Screen off: 9V @ 1.333A = 12W
Screen on: 5V @ 1.1A = 5.5W

Phone is completely stock. Is this normal behavior? With the screen on 2.5W can only keep the battery at a level charge at best.

 

[lopri]

Yes. As long as the screen is on the charge rate is limited to 1000mA. That's my experience with Galaxy phones.

 

[fuzzybabybunny]

Yes. As long as the screen is on the charge rate is limited to 1000mA. That's my experience with Galaxy phones.

Is there any way to remove this limit? Being able to charge at only 500mA (which is basically not charging at all during use) while attached to my QC 3.0 charger is unacceptable.

My old S5 would charge at 1800mA even when the screen was on.