We’re quite familiar with the term tDCS now but people might confuse it with Transcranial Magnetic Stimulation (TMS). While both are techniques of brain stimulation, as the names suggest, they use different sources.  TMS sends a safe and controlled electrical current to the brain using induction. This uses a coil for the production of current. On the other hand, tDCS only uses battery power to create the current. A TMS device is heavy, wall-powered, and uses a high-voltage cable. In contrast, a tDCS device is lighter and less bulky. It can be used outside of a lab or hospital. TMS is often compared to a similar treatment option, ECT.