An anonymous reader writes: Magnetic brain stimulation is an up-and-coming technology and its purveyors seek to apply it to new diseases nearly as fast as they can be diagnosed. The latest comer to the party is Israeli-based Brainsway, which recently got the green light from the FDA to treat depression with their new, deeper-penetrating electromagnet. Dumping up to 8000 amps into their coils and driving it home with more than a kilovolt, any of these machines would make one heck of a wireless phone charger. It should come as little surprise that they could have an effect on your brain. The question we must first demand be answered is — what exactly do they do?