You need a charger that uses QC 3.0 and usb-c to usb-c wire. Same for PB. Search imuto hub QC 3.0 on Amazon. I got one for around 18 quid.

1. Hi dude, I was trying to figure out how get my bmax y13 to charge using usb-c then came across your comment. I know it’s a couple months late but I had the same problem. I resolved this issue by increasing the minimum process state whilst on battery power to 55%.