Use any battery or power supply that has an XT60 connector.
This adapter uses an XT60 to plug in the power supply and a dc 2.1mm male to plug in the goggles.
It will work with all Fatshark FPV video glasses or any other FPV headset provided they are equipped with the same 5.5 – 2.1mm dc plug and the polarity is +ve in the middle and -ve on the outside.
This adapter will save you a good amount of money just because you can use any battery or power supply with an XT60 connector as long as it is within Fatshark’s allowed voltage.
When connecting and disconnecting the battery please remove the adapter from the FPV glasses first and hold on the XT60 male while pulling or pushing the XT60 female power supply connector.