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Device Battery

Education Opportunities

Patient Stories

Read about the experiences of arrhythmia patients and how treatment helped them.

Frequently Asked Questions (FAQs)


Find answers to your questions about cardiac arrhythmias.

Your Implantable Cardioverter Defibrillator (ICD) or Pacemaker Battery

Your ICD or pacemaker battery is specially designed to power your device for a long time. They usually last six to ten years, depending on which device you have and how often it sends electrical impulses to your heart.

When your device battery runs low

When your device’s battery begins to run low, it will give plenty of warning that your doctor can detect during follow-ups with your remote system or in your doctor’s office.

When this happens, your doctor will likely recommend that you replace your current device. A new device is necessary for ICD or pacemaker battery replacement because batteries are not removable from devices.


If you have received an ICD or a pacemaker with leads, the device replacement procedure is usually shorter than your original implantation. This is because your doctor will remove the device, but leave the leads in place, simply plugging them into your new device.

ICD and CRT-D battery advisory

In October 2016 St. Jude Medical announced a global medical device advisory for a subset of our company’s implantable cardiac defibrillator (ICD) and cardiac resynchronization therapy defibrillator (CRT-D) devices for what is termed “premature battery depletion”. Low voltage devices, such as pacemakers, are not impacted. The likelihood that this will impact your health is low, as the vast majority of devices have not experienced premature battery depletion. Find out more about the battery advisory.