Which factor affects battery longevity?

Battery longevity in cardiac devices, such as pacemakers or implantable cardioverter-defibrillators, is significantly impacted by the percent pacing. When a device paces the heart, it consumes energy from the battery, and the more frequently the device is engaged in pacing the heart, the quicker the battery depletes.

For instance, if a patient has a high percent pacing requirement—meaning the device is regularly stimulating the heart—the battery will need to provide power more continuously, leading to a reduced lifespan. Conversely, if the percent pacing is low, the device uses less energy, which can prolong battery life.

While other factors like device model may also play a role in determining battery lifespan through design and technology, the direct relationship between percent pacing and battery depletion makes it the most critical factor in this context.