Using these NewBeeDrone Flow 0802 motors is quite simple. Just install them properly in your device according to the manufacturer's instructions. When using, make sure your power source is stable to avoid any power - related issues. As for maintenance, keep the motors clean. Regularly check the ball bearings for any signs of wear or damage. If you notice any problems, it's best to replace the parts promptly. Also, store the motors in a dry and cool place when not in use to prolong their lifespan.