Abstract: An automated or semi-automated external defibrillator (AED) is provided with a plurality of power sources. The AED includes a first power source that powers circuitry creating a defibrillation electrical shock, and a second power source for powering other circuitry. By including a separate power source for the low-power needs of the AED, the high-power source will typically last longer than if the low-power source were omitted. This reduces maintenance costs, particularly where the high-power source is more expensive to replace than the low-power source. Furthermore, one may use the high-power source as a backup to the low-power source so the AED can still operate even if the low-power source fails.

Abstract: An automated or semi-automated external defibrillator (AED) is provided with a plurality of power sources. The AED includes a first power source that powers circuitry creating a defibrillation electrical shock, and a second power source for powering other circuitry. By including a separate power source for the low-power needs of the AED, the high-power source will typically last longer than if the low-power source were omitted. This reduces maintenance costs, particularly where the high-power source is more expensive to replace than the low-power source. Furthermore, one may use the high-power source as a backup to the low-power source so the AED can still operate even if the low-power source fails.

Abstract: A battery chemistry identification system and method that identifies the chemistry of an installed battery pack which may be one of a number of battery packs having different battery chemistries. The battery packs have electrical and physical interfaces that are functionally interchangeable. The battery packs include one or more distinguishing features in either or both aspects of the interface. The identification system includes a sensor appropriate for detecting the feature(s) and, based on the presence or absence of those distinguishing feature(s), determines which battery pack and, hence, which battery chemistry, is installed in the battery-powered device. In one particular embodiment, the system determines whether a battery installed in a battery-powered device having multiple use models is a commonly available industry standard battery pack or a customized battery pack. The industry standard battery pack has a first battery chemistry and a standard mechanical and electrical battery interface.

Abstract: A defibrillator applies a defibrillation waveform to a patient. Waveform selection circuitry in the defibrillator uses a reference waveform to give the defibrillation waveform a desired shape. Preferably, a user selects between a plurality of stored waveforms, and the reference waveform is generated from the stored waveform selected by the user. As an alternative to selecting a stored waveform, the user may also create a new waveform, which is then stored for a future selection.