This is a illuminating Cosmic Cube battery from Hydra Factory from the 2011 superhero film Captain America: The First Avenger. Constructed of resin, Plexiglas and aluminum, filled with tiny translucent beads and completely wired with blue LED lights that emit an otherworldly glow via the discrete switch on one of the ends. These battery packs are visible during the sequences in the Hydra Factory when Dr. Zola is briefing Schmidt on production and Captain America discovers them.
This impressively detailed piece measure 13 in. x 4 in. x 2 in. and show some signs of production wear at the ends where the electronics are housed, with some black gaffer and putty repairs; otherwise, as screen-used.