I consider this to be a bit of a downgrade - the Mini 1 would accept anything from 12-48 V without negotiation, which made it really easy to power from a vehicle battery or DC wall power (if you have off-grid solar). If you did want to supply it via USB you just needed a small and cheap "dummy load" to negotiate for a voltage in that range. Now, you have to use a PD supply, and those are very hard to find at 36/48 V.