Abstract: Portable charging devices for mobile devices such as cell/smart phones, computing tablets, MP3 players, gaming devices, and laptop computers and the like are disclosed. The devices may include a housing enclosing the circuitry and a cable extending from the housing on one end and terminating at a charging connector on the other end. The charging cable can wrap and unwrap around a groove or slot in the perimeter of the housing to facilitate different use modes, such as a storage mode, a rigid use mode, and a flexible cable use mode. The device may be in the form of a rechargeable battery bank and/or an inductive receiver and may be dimensioned so that when connected to the mobile device in rigid use mode, both the mobile device and charging device can lay substantially flat on the same supporting planar surface, such as a desk or table.

Abstract: A method to transmit and receive significantly larger serial data stream to achieve conformance to the signal interface constraints of a pre-installed transmission system thus minimising bit error rate for both the large serial data streams and the pre-installed streams the method includes the steps of de-serialising an initial incoming signal into M data streams, wherein M>2, each M data stream having a data rate of D/M Gbps, partially serialising and encoding M data streams into K symbol groups where K is an integer greater than or equal to 1, each K symbol group characterized by N concurrent data bits of the N data streams, wherein each N data stream has a data rate of D/(N·K), processing each of the K symbol groups to provide one modulated output signal the K modulated output signals then being transmitted via K channels of an existing wavelength division multiplexing system, so as to enable transmission of significantly large data streams over pre-installed transmission networks.