Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, MP3 players, personal digital assistants; DC/AC power converters; Electric power converters; Harnesses specially adapted for holding electronic devices, namely, smart phones, MP3 players, compact video cameras; Inverters for power supply; Off-grid power and deep cycle ba...