A power charging system for charging portable electric devices. The fire-containing compartment includes first and second layers of fire-resistant material selected from the group consisting of a barrier sheet, a high loft batt, and a fire-resistant chemical. The cable has first and second opposing ends, with the first end being operable to be coupled to a computing device, and the second end being operable to be coupled to the input device. The rod is coupled to a slidingpivoting joint, so that the rod may slide radially inwardly and outwardly as the primary mass moves along the primary guide.