Hello there Coreyboulet. Good day and thank you for the inquiry. As posted above by Buzzyone on post #3. You can try using the DJI FPV Car Charger to charge your DJI FPV. The DJI FPV Car Charger can be used to charge the DJI FPV Intelligent Flight Battery through a car's power socket. Overheating protection will automatically cut off charging if the accessory port exceeds a certain temperature. Thank you.
sbarton Posted at 4-30 05:34
You need a Battery Power station (sometimes called a battery generator). Basically a large batter with built in inverter.
https://amzn.to/3aRATuJ