Physio Control/Medtronic has been a major player in the medical technology world for a long time now. This manufacturer originally focused in treatment of cardiovascular diseases and has a broad experience in defibrillation equipment in hospitals.The Lifepak CR Plus AED is ideal for those with little experience. There are only three steps necessary in order to provide a defibrillation shock. This AED is available in a semi-automatic and fully-automatic version. The CR Plus also has a long warranty period of 8 years. The Lifepak 1000 features a high capacity battery, enough for about 425 shocks. This semi-automatic AED is also available with ECG display and has a 5 years warranty period.