Just wanted to share with you some observations we had while charging dji spark batteries.
DJI did a nice job of keeping everything slim. The batteries slip in very nicely and lock. First thing we notice is all batteries are charging at the same time. This is a change from the previous drone...
Yes you can fly the Mavic without the controller using your phone.
They sell them cheaper without it here:
Buy Mavic Pro - Aircraft (Excludes Remote Controller and Battery Charger)
We also have the dji googles and love them...