Multi-directional currents are generated in a medium by cyclically reversing the direction of a conventional current applied to at least one of at least two electrodes so that an electromotive force (EMF) pulse travels from side of the electrode to the other, changing the direction of current in the medium. The multi-directional currents may be used to accelerate electrolytic processes such as generation of hydrogen by water electrolysis, to sterilize water for drinking, to supply charging current to a battery or capacitor, including a capacitive thrust module, in a way that extends the life and/or improves the performance of the battery or capacitor, to increase the range of an electromagnetic projectile launcher, and to increase the light output of a cold cathode light tube, to name just a few of the potential applications for the multi-directional currents.