Battle drones are often set up and ready to fly out of the box, designated by an “RTF” label. In these cases, the battery might not be fully charged, but the unit’s components will all be in the correct spots for flight. Simply pair the drone to its remote, and you’re good to go.Some battle drones are slightly more complex. In these cases, you'll need to attach different weapons to the drone or install the propellers. Thankfully, these usually snap into place with no tools required. Battle drones with cameras, mobile apps, and other advanced features could require more setup time.