This battery assembly powered the Sony Handycam SteadyShot video camcorder used with the Thermal Enclosure System-Crystal Observation System (TES-COS), which housed protein crystal growth experiments on the Space Shuttle.
Researchers from the University of Alabama at Birmingham, actively involved in experiments for Shuttle flights, gave this item and a large set of protein crystal growth equipment to the Museum in 2012.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.