Capacitor configuration for use in a subcutaneous implantable cardioverter-defibrillator having a tubular shape, including a first plurality of high volumetric efficiency capacitors, each one of the first plurality of high volumetric efficiency capacitors having a disc-shape, the first plurality of high volumetric efficiency capacitors being coupled in parallel and arranged in a stack as a first array of capacitors, thereby forming a cylindrically-shaped capacitor.
