The goal of brain-machine interface (BMI) is to convert thought into action and sensation into perception. This novel technology holds the potential to revolutionize healthcare and neurorehabilitation. A major challenge in translating BMIs to the patient population is the lack of clinically viable implantable devices that will last a lifetime. To achieve this, wirelessly addressable battery-free implants are a must: there can be no transcranial feedthrough for wires or batteries which require replacement.