Embodiments of the present application relate generally to wireless electronics, wireless portable electronics, wireless media presentation devices, audiovideo systems, and more specifically to passive or active RF proximity detection of wireless client devices in an environment that may or may not include wireless access points. During operation, the system charges the battery from an initial state to a rest point prior to reaching a fully charged state. The representation includes a set of graph components, where each graph component is associated with at least one sequence counter from among multiple sequence counters. An input device is provided on a steering handle of the dummy bicycle. The third taper has a lesser degree of taper than the second taper.