This ‘Flying Battery’ Drone Can Fly Two Hours on a Single Charge
the startup company Impossible Aerospace. It has developed a drone called the US-1 that can fly a whopping two hours on a single charge.
That maximum flight time is roughly five times the 25-30 minute max offered by competitors on the market such as the DJI Phantom 4 Pro.
Once drained, the drone can also recharge to 75% in about 45 minutes of charging.
https://petapixel.com/2018/09/11/this-flying-battery-drone-can-fly-two-hours-on-a-single-charge/