A power transmission control apparatus is for use with a vehicle that includes a power generator. Apparatus for carrying out the method is also described. The load control device may comprise a communication circuit coupled to the microprocessor for transmitting andor receiving digital messages the microprocessor cause the communication circuit to draw less current from the power supply during the low-power mode. Additives may be included in the pellets such as various plant nutrients and micro-nutrients. In one embodiment, the operating conditions may be detected by the computing device while in a first power state, wherein the unattended wakeup event is to transition the computing device to a second power state.