Abstract: A heating pad, a portable electric heater and/or an article of manufacture. The heating pad comprising: a first heating fabric comprising graphene; a nanotube-based film having a first surface coupled to the first heating fabric; a second heating fabric coupled to a second opposing surface of the nanotube-based film; and a flexible circuit disposed between the first heating fabric and the nanotube-based film, the flexible circuit configured to facilitate an increase in temperature by at least the first and second heating fabrics.

Abstract: Systems and methods for providing a buoyant portable device. The buoyant portable device, comprising a frame and layers disposed in the frame. The layers comprise a first layer spaced apart from a stack of densely packed second layers such that a hollow cavity filled with air resides between the first layer and second layers. The hollow cavity has a size/shape providing an overall density of the mobile device that is below a density of a liquid that the mobile device displaces when the mobile device is disposed in the liquid. The second layers comprise an electronic layer residing adjacent to a cover/display layer. The cover/display layer is configured to allow a user to interact with electronic components of the electronic layer and has an overall weight less than a combined weight of the frame and at least the first layer of the plurality of layers.