Energy pack

Energy packs are an energy source from the cartoon portion of the Generation 1 continuity family.

Energy packs are a type of Transformer fuel cell. They can be improvised into explosive devices by linking them together in a daisy-chain with energon cubes.

Fiction

The Transformers cartoon

After being transported into Cybertron's past during the Golden Age, the Aerialbots attempted use energy packs to blow up the stored energy in an energy dock in order to prevent Megatron from stealing the fuel and thus make him nearly unstoppable in the future. After successfully detonating the energy stockpile and returning to the present, Silverbolt presented energy packs to Optimus Prime to refuel Omega Supreme for their journey back to Earth. War Dawn