An IDS Battery is a cylindrical object that when installed in an IDS Receptacle allows switching to a particular dimension. Each battery is filled with Science Juice mixed with Dimensional Extract, giving each battery a different color, one for each dimension. When in a given dimension, the Science Juice seen flowing through all the conduits in the area appears the same color as that dimension's battery.
IDS batteries can be found simply laying on the ground, being spit out of one of the various DOLLI devices, or in the hands of the Interdimensional Kenetic Enetity, or for short, Ike.