A battery operated concrete saw system includes an electric saw and a lithium based battery pack including a plurality of batteries connected in series to power the saw with at least 80 volts. These assays may be used to identify T1R2 modulators, especially taste modulatory compounds. This is repeated until capture is terminated. In order to create a secure load-receiving apparatus, the annular retaining element is designed in the form of a conical sleeve or a truncated cone, and has an exterior outer surface, an interior outer surface due to the sleeve’s conical shape, an upper annular top surface, and a lower annular base surface. A displacer clearance is created between the second pair of displacer elements, similar to first pair of displacer elements. In one embodiment the encoding of metadata may be executed by translating or adjusting pixel values of the video signal within the secondary image area, such that the pixel values are repurposed to contain the metadata and wherein the metadata is visually imperceptible.