Abstract: An apparatus for powering an electrical device from different type battery packs is presented. The device includes a housing with a power management unit within the housing and a plurality of input connectors. The power management unit includes an input terminal and one or more output terminals. Each input connector is coupled to the input terminal of the power management unit. Each input connector is configured to be removably and securely coupled, electrically and mechanically, to terminal contacts of a distinct connector type battery pack of a cordless tool device with voltage ranging from about 4 volts DC to about 25 volts DC. The device includes one or more USB output ports coupled to the one or more output terminals of the power management unit to provide a fixed power source for powering electronic devices, such as smartphones and tablets, in the field.