@linmob, thanks a lot for this kind recommendation of yours! I found power supply you mentioned on eBay.de. It is just that my Librem 5 Wi-Fi was somehow purposely on during charging (even added some “jacket” on top 
), as published here, but otherwise I certainly do agree with your recommendation to turn Wi-Fi/BT HKS off during charging (when possible, especially when the battery rest capacity under 50%).
@cchelak, all above thoughts of mine as recently promised here: A Humble Librem 5 Daily User Review - #15 by Quarnero. And to be quite precise here in this post below “numbers” are related to the ANKER PowerPort Atom PD 1 30W GaN:
Anker PowerPort Atom PD 1 might emit up to 5.17V (while Librem 5 gets/receives up to 5.06V toward the end of charging, as voltage registered during the termination process of charging) and that is only “thing” that is not entirely up to my liking (cannot qualify this as bad behavior as wasn’t researching much about), but I wasn’t noticing any problems with this slightly higher voltage (than expected) or it is just that I’m preferring fine calibrated ones up to 5.00V.