Abstract: Charge signal simulates a stock charger to connected portable device(s) to trigger a charging cycle. Monitoring charging port(s) for overcurrent and/or electrical short charging conditions allows charge current to be modified when necessary. While attached portable device(s) continue to charge, docking station automatically switches from charger mode to data transfer mode so that other attached devices can use and/or be used by portable device(s). Once data lines, except power line, are switched portable device(s) simultaneously charges and transfers data at same time. To identify proper charge signal, vendor identification (VID) or product identification (PID) may be read from attached portable device(s) and referenced against charging standards. Updatable firmware allows new device configurations and corresponding charge signals to be added.