An arrangement configuration of a battery locking mechanism in an electronic apparatus is taken into consideration to make further downsizing of the electronic apparatus possible. Specifically improvements related to the use of a yeast-based vaccine comprising a yeast vehicle and an antigen that is selected to elicit an antigen-specific cellular and humoral immune response in an animal, for use in prophylactic andor therapeutic vaccination and the prevention andor treatment of a variety of diseases and conditions are disclosed. The second receiver section receives a second probe signal from a second transceiver at time t2, wherein the first and second probe signals have substantially similar carrier frequencies. Fuel enters an inlet port coupled to an inlet passage within the piston. The network may comprise any number of participants, including consumers, retailers, manufacturers, third-party providers, and the like.