Some wireless chargers do have a fast charge mode but itll only work with phones from the same manufacturer. 7 if the devices battery is complete discharged the device may not turn on immediately or show any signs of charging after being placed on the wireless charger.

Galaxy S8 Users Report Trouble With Wireless Charging
Problems with samsung wireless charger. There is nothing to do to solve it but to visit a technician. Its one of the most common issues that cause wireless chargers not working. Your samsung wireless charging pad stops charging suddenly and blue led starts blinking. If youve got samsung wireless charger not charging problem check below what causes this and all the workable solutions to solve the problem. Try wireless charger to charge your samsung phone and see if it can charge normally. Troubleshooting android boot problems.
Weve covered this in the previous post. All workable solutions for samsung wireless charger not charging i think the cases in this post apply to any wireless charger. Cables fail more than you think. Fixing a wireless charger is similar to fixing other devices that decide to not play well with android. The samsung wireless charger can charge your one phone wirelessly but fails to charger others. If your wireless charging pad and phone do not seem to connect or your charging pad is making strange noises you can easily resolve both of these issues.
Some sellers offer free replacement for the accessories of the wireless chargers. When your wireless charger stops working starts charging slower keeps making your phone turn on and off or anything else its time to start troubleshooting. For example make sure your phone is placed correctly disconnect any accessories remove the phone case and check your charging cable. If not then it is a problem with the battery or hardware. If you use a samsung fast wireless charging pad with the cable and wall charger that came with your s8 then. 6 if you use the wireless charger in areas with weak network signals you may lose network reception.
The wireless fast charging apparently does not work with many third party accessories. Charging problem is among the phone common power related issues galaxy owners have reported so it doesnt surprise us to receive messages from owners complaining about their phone not charging. So a google qi charger might fast charge a pixel but not a galaxy. Even though it is expensive it shouldnt be too costly if your samsung phone is under warranty.