An implantable medical device such as a defibrillator is described. The device includes an hermetically sealed housing containing a flat electrolytic capacitor and an energy source such as a battery. The battery is connected to the capacitor and provides charge thereto. The capacitor stores the charge...http://www.google.com/patents/US6157531?utm_source=gb-gplus-sharePatent US6157531 - Implantable medical device having flat electrolytic capacitor with liquid electrolyte fill tube