Abstract: A water activated power supply for signaling a control device of a detection of a body of water or other ionized liquid, and for triggering a bistate device upon the detection of a body of water or other ionized liquid. The water activated power supply comprises a power source, and a buffering circuit. The power source is operable to generate a first electrical power. The buffering circuit includes a buffer operable to provide a second electrical power. The buffering circuit further includes a water activated switch to conduct a portion of the first electrical power to the buffer when a body of water contacts the water activated switch. The buffer provides the second electrical power in response to the portion of the first electrical power. The buffer further isolates the power source from any external load device, e.g.