Ok it works
https://www.amazon.com/dp/B089FC1TRF?psc=1&ref=ppx_yo2_dt_b_product_details
https://www.amazon.com/dp/B07P81526M?psc=1&ref=ppx_yo2_dt_b_product_details This is the combo I tried and the battery shows the charging icon
Don't forget you can rely on USB-C charging as a backup. I just got a 100 watt Nekteck from Amazon for $33. oops! USB-C charging not supported! ☹️
Update: it's a lightening deal on Amazon right now for $29.19 for anyone interested.
https://www.amazon.com/gp/product/B089FC1TRF/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
This is the one I carry in my bag for college.
Works great, is relatively light, and is only like $35.
The PINE64 wiki has a page on Pinecil power supplies that both tells you what you need to look for and has suggestions for some specific power supplies.
The PinePower (non-desktop) will work and is hard to beat for price. (Caveat: I haven't used it myself, but other people definitely seem to like it. I usually use mine with a Nekteck 100W charger (no longer available, apparently) or an Amazon Basics 100W charger. The 100W chargers are overkill for this, but I already had them onhand for powering my laptop.)
some people recommends this one but only available in Canada
https://ca.aukey.com/products/aukey-omnia-single-usb-c-pd-100w-charger-black
i end up getting this one instead which worked just fine
https://www.amazon.com/gp/product/B089FC1TRF/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
with display port adapter, i have not try it with external display yet.