A power outlet comprises an enclosure with a plug jack, a reset button comprising an extension arm, a transition contour on the extension arm and at least one safety shield configured to selectively block at least a portion of the plug jack. A desired charging voltage is determined in response to the power source type and the battery voltage. Each smart card contact pad includes a plurality of contacts. A suture anchor can be attached to the suture, and the resulting assembly can be combined with a needle designed to introduce the anchor and suture into patient tissue, e. Then, by analyzing how the measured densities of all the patches change with changes in code values, the optimum set or sets of the three input code values, that when used together produce a desired set of aim neutral density patches in a single iteration, are determined. Under the contact usage, the basic arithmetic circuit group performs one basic operation of the targeted operation at one cycle.