I made a little #3dprinted hat so a #pinephone will fit in galaxy s20 ultra cases and have such a case with a battery in the mail right now.
https://www.thingiverse.com/thing:5247600
https://forum.pine64.org/showthread.php?tid=16094&pid=106862#pid106862
I think I got the spacer height dialed in now. Will test when my galaxy s20 ultra battery case arrives in the mail.