A battery characteristic converter comprises an interface to a battery and to an electronic device to be powered with energy supplied by the battery. A baseband signal down-converted by a frequency converter is output to a signal processing section through a board-to-board connector after passing through a delay circuit. Grouping may be done dynamically according to one or more of the following factors: \u2014the terminal’s signalling overhead\u2014the affordable processing complexity\u2014the traffic load\u2014the radio conditions. The dimension of the blocks is measured in units of gobs and each gob is of a fixed dimension of bytes. The horizontal support can be moved between its first, use and second, stowed positions by manipulating the horizontal support mounting unit.