On this page you will find the batteries for the Cardiac Science Powerheart G3 and G5 AED defibrillators. The Cardiac Science batteries are easy to replace. The self-test will start Immediately after replacing the battery. The AED types Powerheart G3 Pro and Powerheart G3 Plus do not use the same battery: type 9146 is intended for the Powerheart G3 Plus and battery type 9145 is designed for the G3 Pro. The batteries are non-recheargable.