Intelligent modular battery pack assemblies and associated charging and docking systems are disclosed. In one embodiment a modular battery pack assembly may include an outer casing assembly, a thermally conductive structural housing element configured to house a battery assembly in an interior volume, a lid element configured to cover the opening in the thermally conductive structural housing element and mechanically strengthen the thermally conductive structural housing element, and a circuit element disposed to electrically couple the battery cell to a battery-powered device and provide viral data transfer between the battery and a coupled device.