There are ICE powered drones, but they aren’t strictly better. Batteries do a lot of things very well such as ramping up and down power output drastically with

There are ICE powered drones, but they aren’t strictly better. Batteries do a lot of things very well such as ramping up and down power output drastically with sub second response times. This allows quadcopter to be very simple mechanically making them scale down really well into a tiny package someone can carry several of them without significant issue. As a bonus tiny drones can be reasonably quiet and cheap.