PPM Power requirement

[ThunderStrk]

Working external battery pack?

Any suggestions for external usb-c battery pack to connect to PPM? Or did anybody try to connect external battery and see it working/charging? I have 2 different external USB c battery pack (both linked below) and none of them seem to charge the PPM. (the charging icon next to the battery does not appear when connecting the battery to usb-c power source). I will try and post video later whenever possible. Really surprised that first one below didnt work

It’s a long read but lots of useful info and links.