So, I wanted something more versatile than the DJI car charger to use while driving between drone operation locations. I found this one and it works great! It charges my P4 batteries with no issues and is as fast as if charging at home.
It's the Potek 300w Power Inverter, 12V DC to 110V AC car...
p4 is hard enough to keep in sight based on size and background light. Anyone know how to get 12 volts from inside to outside the case so I can add some long range strobes?