Jumpstart is a Mini-Con from the video game version of the Unicron Trilogy.
Don't ask where the jumper cables attach.
Jumpstart is one of many power-enhancing Mini-Cons scattered across Earth. A member of the Red Mini-Con Team, when Powerlinxed to a larger Transformer, Jumpstart transforms into a powerful electrical blaster. Enemies near the target struck by the beam may also take damage as the bolt leaps from enemy to enemy.
Fiction
Transformers Playstation 2 Game
Jumpstart's Mini-Con storage panel was discovered on Megatron's Pacific island base, on a tiny ledge on the sheer rock face of the volcano, above the deep blue sea. It was only with the use of Slipstream's glider-pack that the Autobots were able to recover him. Following the defeat of Megatron, he and the other Mini-Cons returned to Cybertron and helped form the Matrix Cannon, Nemesis Shield and Vanguard Booster, giving the Autobots the power needed to destroy Unicron.