A method for occupancy based energy optimization can include determining a size and speed of a number of objects within an area, determining a number of human occupants within the area based on the size and speed of the number of objects within the area, and altering a number of environmental settings for the area based on the determined number of human occupants. Before a mobile station transmits a data signal, it transmits a signal referred to as a preamble signal to measure the transmission timing to the base station. The diagnostic capability includes collecting network performance data and either analyzing or forwarding data for analysis. A hit ball is caught by the net and recycled to the batter. As such, the system is able to optimize the charging current supplied to a battery cell during a constant current mode of operation while compensating for circuit elements whose resistance may vary over time due to temperature or other factors, such as corrosion, while at the same time avoiding exceeding the maximum recommended voltage for the battery cell. Each of a plurality of fasteners is coupled to a respective strap extending from one of the end flaps.