Such a poignant shirt. As your eye scans from left to right, you see, in turn, each robot. The first small one symbolizes love of power. This robot is so consumed with its lust that it is about to tip over from enthusiasm. The second robot stands there, pondering the futility of existence. The third robot symbolizes greed, it's mouthy countenance and grasping claws. The fourth robot gazes skyward, shaking its fists at an uncaring deity.
The large robot represents the great white god of capitalism, dispensing token batteries as a tax shelter, all the while, it obviously has no place to put batteries into its own body, and in fact, considering that it uses visible electricity instead of rigid armatures, most likely has a fusion reactor within, peddling worthless knick-knacks while flaunting its excess. How many small robots could be powered by the energy needed just for its left arm?
The final small robot has decided to end it all, pulling out its battery in a single stroke, rather than to grovel for pittances, unexpectedly and ironically staring at the very basis of its life for all eternity as a visible and lasting protest. Will the large robot heed his request, or will he be forcibly rebooted?