Abstract: A portable power bank is providing having a main first battery, a deployable AC power input plug, and at least a second battery. The first battery is removably affixed to the second battery by a mating slide connector forming an interchangeable tongue and groove connection that mechanically and electrically connects the first battery to the second battery. A plurality of output ports connected to each battery can be connected to a USB standard connector, a USB micro connector, a USB mini connectors, a full duplex USB type C connector, or a Lightning form factor connector. Such a modular system connected batteries to be recharged from a single AC plug. The multiple output ports allow for charging of more than one portable electronic device. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.