does drag brake use up any battery power?

[BrianG]

That's odd. Usually, the ESC sorta dumps the energy from the motor EMF back into the battery thereby increasing runtime.

The only thing I can think of is that the drag brake is slowing down the truck enough where you need to apply more power to go again as opposed to coasting.

[MetalMan]

Originally Posted by BrianG

The only thing I can think of is that the drag brake is slowing down the truck enough where you need to apply more power to go again as opposed to coasting.

Exactly what I was thinking. The return from the drag brake back into the battery is less than the equivalent amount of power required to get back up to the speed you were at before the drag brake kicked in.