Powerheart AED G3 Automatic and Semi-Automatic Defibrillator provide reliable and automated external defibrillator. The fully automatic AED administers a defibrillating shock (when appropriate) without any shock button for the user to press where as the semi-automatic AED administers a defibrillating shock when the button is pressed giving the users an option to chose from. The device with Rescue Ready defibrillator technology offers a daily self-tests of all main components (battery, hardware, software, and pads). Automatic and Semi-Automatic Defibrillators gets partially charged weekly of the high-voltage electronics and a full charge monthly. The device automatically calculates electrical impedance and during necessities of subsequent shocks, the STAR biphasic technology enables escalation of energy to ensure higher level of therapy. The battery comes with a 4 year full battery operational replacement guarantee and 7-year warranty of the AED.