Most commercial drones have 4 motors w about 12 magnets each. Some others: electric bikes, electric skateboards, power tools, blow dryers, iPad cases. If I re

Most commercial drones have 4 motors w about 12 magnets each. Some others: electric bikes, electric skateboards, power tools, blow dryers, iPad cases. If I recall correctly, one of the earlier iPhones was basically held together w rare earth magnets, with the screen module magnetically stuck into the case. Can't find info to verify this though, so take it w a grain of salt.