I'm sticking with DJI product. The P3 hub works great so I ordered the P4 version. Also the car charger. I had over $100 credit on the DJI store from ordering my P4 so might as well use it. Also free shipping starts at $150 and these two items total $152. Hope to get them soon and try them out.
That's exactly what I ordered too. The ability of the hub to put the batteries into storage mode seems like it will be very useful.