Energon star

Energon stars, tasty with a savory mercury sauce and a light sprinkling of electrons-trons, are produced by the Omnicons and Terrorcons. They are useful for the storage of mined Energon in a compact, more stable form, and can also be attached directly to Transformers' bodies and used as short-lived power booster cells.

Energon stars are vaguely round, flattened bodies with protrusions that form a rough star-shape. They are transparent red or green, because it looks like delicious candy. Those produced by the Terrorcons are green, but the Omnicons' products are red, because the good guys get the yummy red ones.