There are many reasons you may need to buy parts and accessories for your drone. Parts wear out — propellers, for instance, and motors and batteries. Things break — parts like landing gear, antennas and gimbals — which you know, if you’ve crashed a few times. You may want to add convenience — buy extra batteries and a quick charger, a carrying case or something as simple as a lanyard for a controller. And sometimes you seek to boost the performance of your drone, flight controller or camera, which means upgrading from original equipment.