This FAQ explains which power connector is used in the following devices:
- BL-819 and BL-830
The power jack is a type 2 EIAJ RC-5320A Connector.
The socket has a:
- 1.65mm inner pin diameter
- 4.4mm socket internal diameter
It is designed to mate with a plug with a 4mm outer diameter.
The power supply for this socket can be bought from Brainboxes part number PW-800: