Patent ID: 8498701

Claim:
An external defibrillator, comprising: a battery; defibrillation circuitry, the defibrillation circuitry powered by the battery and including a micro-controller programmed to conduct a self-test and programmed to perform a rescue by executing a program stored thereon, the self-test including at least some portion of the defibrillation circuitry, the self-test being capable of determining an operational status of the external defibrillator; and an active status indicator comprising a first light source that illuminates, the first light source operated by the programming running on the micro-controller, wherein when the most recent self-test has determined that the defibrillator operational status is normal, the first light source illuminates to indicate that the defibrillator is ready for use wherein the self-test is conducted with the defibrillator being OFF from the perspective of a user.