Abstract: An enhanced battery compartment associated with a night vision monocular device (NVMD) can support multiple battery types. For each battery type, a NVMD can receive an input voltage from a power source within an interior chamber of the enhanced battery compartment. The power source can be a AA battery or a CR123A battery and no additional adapter is required when the enhanced battery compartment has been attached to the NVMD. The NVMD can conform to an Army Navy Personal Viewer System 14 (AN/PVS-14) device. The NVMD can regulate the input voltage from the power source and provide an output voltage conforming to a pre-determined setting. In one embodiment, regulation of the input voltage can be performed by a component external to the enhanced battery compartment and installed in the NVMD, such as a subsystem or subassembly of the NVMD. The NVMD can activate a monocular subassembly associated with the NVMD utilizing the output voltage.