My 8 pro is 6 month old.
With phone turned off, original warp 30 charger and cable, I got from 28 to 78% in 60 minutes.
Even after wiping cache data. said:
when using my old cable from OnePlus 6, I went from 20 to 80% in 30 minutes.
So, looks like the cable might be the cause for slow charging issues.
Last edited: Jan 24, 2021