Abstract: A stock prod having a circuit that may be operated by a micro-controller, allows the prod to deliver a consistent voltage level to discharge electrodes, even though the power sources may vary. An improved transformer and the use of polypropylene increase the safe operation of the prod. The voltage to the discharge electrodes of the prod can be adjusted within a predetermined range of voltages, energies, and/or pulse rates to allow the prod to be effectively used on subjects having different physical parameters. The prod may be provided with a single or multi-function actuator, and a trigger that may be selectively disabled by a lock. The prod may also include a variety of indicators with which an operator may assess the operational characteristics of the prod. The prod may include a removable, rechargeable power supply that may be combined with a charging station to form a stock prod system.