Hi @Tormod-Axelsson-Hagen
Our descriptions tell you all you might need to know to make your own power module:
2-6S tolerant (so VIN capable of up to ~25.2V+)
6A output at 5V
Current monitoring if you do not use our ESCs (our ESCs provide a current reading to keep PX4 and other autopilots happy and for accurate remaining battery %)
Connector format of your choosing but the Molex 4-pin MINI SPOX is the direct 1:1 for VOXL 2 https://www.digikey.com/en/products/detail/molex/0022057045/403343?s=N4IgTCBcDaIAxzGOBWA7HALCkBdAvkA
If you want to make this flexible for VOXL 2 Mini, make it capable of generating 3.8V and use the MOLEX MICRO ONE family of connectors https://www.digikey.com/en/products/detail/molex/2059720041/13235081?s=N4IgTCBcDa4AwFYCcB2Mc4BYCMIC6AvkA)The rest is up to you based on your design intent and supply chain constraints and preferred vendors.
Hope this helped!