The utility model discloses a super capacitor and a power battery shell. Wherein the shell body consists of a front side surface, a rear side surface, a left side surface, a right side surface and a bottom surface; the shell body is provided with a plurality of pressing grooves, each of four corners of the front side face is provided with a first protruding block, each of four corners of the rearside face is provided with a second protruding block, and the upper end of the front side face and the upper portion of the rear side face are each provided with a plurality of grooves. According to the capacitor and the power battery shell provided by the utility model, the heat dissipation area of the capacitor shell can be increased through the arrangement of the convex block I, the convex block II, the pressing groove and the groove; and on the other hand, when gas is accumulated in the capacitor shell, the gas can press the pressing groove to expand outwards, explosion caused by bulging of the capacitor shell is prevented, the service life of the capacitor can be prolonged, and the strength of the capacitor can be improved.