I don't know!? I have a Nokia9 PureWiev and an Anker wireless charger with two coils. I used Nokia original charger which came with phone and connected it with Anker. On my surprise on my phone screen showed "wireless fast charging" all the way to 100% full battery. It looks like that on wireless is quick charging whole time. Please take this with a grain of salt, because I don't know if this is a bug or a feature. Nokia charger is QC 3.0.