9 Accumulator boxes; alkaline batteries; apparatus and instruments for regulating energy; apparatus and instruments for storing energy; apparatus for distributing electrical energy; audio equipment, namely, speakers, audio mixers, audio-frequency transformers, baluns, cables, power adapters, speaker; battery adapter; battery boxes; battery cable; battery chargers; battery chargers for use with telephones; battery lead; batteries; batteries for hearing aids; battery testers; battery starter cable; downloadable computer software for the function control of audio and video devices; recorded computer software for the function control of audio and video devices; digital measuring devices for measuring of current, voltage, sound level, receiving field strength, electrical power, temperature; electrical lugs; electrical cable connectors; electrical measuring devices for measuring of current, voltage, sound level, receiving field strength, electrical power, temperature; electric control devices for energy management; grids for electric accumulators; insulated electric cables; headphone and microphone combinations; headphones; lithium ion batteries; microprocessors; microprocessor controls; voltage testers, namely, millivolt meters; components for electrical mains in the nature of connectors; power supplies with voltage stabilizer; electric switch plates for electric accumulators; cordless headphone sets for smartphones; downloadable software for improving audio-visual capabilities of multimedia applications, namely, for the integration of text, sound, graphics, still and moving images; recorded software for improving audio-visual capabilities of multimedia applications, namely, for the integration of text, sound, graphics, still and moving images; downloadable software for programmable microprocessors; recorded software for programmable microprocessors; electrical voltage limiter; voltage detector; tension meter; voltage regulating apparatus; voltage test equipment; voltage converter; voltage monitoring modules; power units, namely, batteries; acid meters for batteries; portable media players; portable computers; portable radio transmitters; portable cassette players with radio; portable testing equipment for testing of current, voltage, sound level, receiving field strength, electrical power, temperature; portable stereos; portable telecommunications apparatus, namely, mobile phones, pagers, baby monitors, fax devices; portable sound recorders; portable sound reproducers; portable video cameras with built-in video cassette recorders; rechargeable battery cells; electricity conduits