Not sure a ferrite core on a cable or a shield sleeve will protect against ports being fried by ESD (electrostatic discharge). They mostly protect against EMI (electromagnetic interference) which can mess with your signals. Ferrite catches EMI and dissipates it as heat. ESD causes EMI so you get protection that way, but I don’t think it will prevent your brain ports from going dead. Staticide sprayed on field, not dragging your unconnected ends of cables while plugged into brain, not mounting the brain via the built-in screw holes but via the plastic bracket accessory thing instead, touching some grounded metal before you touch your robot, etc., those are the few tricks that have been suggested. I’m not an expert - @jpearman should be kindly summoned for this one - but that’s my understanding. Please correct if wrong. Our teams are constantly losing ports as well. With 8 motor limit and not much in terms of v5 sensors it is manageable and we don’t feel like complaining, but still, these things are not cheap. Winter is coming to our neck of woods, heat is on, air is dry, there is carpet everywhere, ESD is a real thing so we’d like to hear some good intelligence on this as well.