Beyond painting the pack and adding more physical details, I felt it was important to add some lights to the mix. The original pack is completely inert, so really, anything would have been an improvement.

As it just so happens, a common 8 x 5050 RGB LED bar (such as the Adafruit NeoPixel Stick) fit perfectly inside the "Power Cell", which would let me recreate the animated light effect seen in the film.

The bar was glued down into place, the wires were run out of a small hole cut into the bottom of the opening, and a 3D printed PETG lens was installed on top to diffuse the light.