Do AEDs Expire? What You Need to Know About Pads, Batteries, and Readiness

Picture this: an AED is mounted on the wall near the front desk. It has been there for a couple of years. Nobody has touched it. It looks fine. The green light is on — or at least it was, last time anyone noticed.

Then one afternoon, someone collapses. A coworker grabs the AED, tears it open, and the device either fails to power on or delivers an incomplete shock because the pads have long since expired.

So — do AEDs expire? The short answer is: the device itself does not have a hard expiration date, but the components that make it work absolutely do. And in a cardiac emergency, those components are everything.

Do AEDs Expire? The Short Answer

AED units are built to last. Most devices have a manufacturer service life of eight to ten years or more, assuming they are stored properly and maintained. The hardware itself is not the issue.

The issue is what is inside the AED — and what is attached to it.

AED pads and AED batteries both have defined expiration dates. When either of those components is expired or degraded, the AED cannot do its job. An AED is only as ready as its components, which is why AED maintenance is not optional — it is part of having the device at all.

AED Pads: Why They Expire

AED electrode pads are coated with a conductive adhesive gel that makes firm, consistent contact with the patient's skin. That gel does not stay effective forever. Over time — whether the pads are used or not — the gel dries out and the adhesive weakens.

When pads degrade, they may not stick properly, conductivity can drop, and the AED's ability to accurately analyze heart rhythm or deliver an effective shock can be compromised. In a situation where every second counts, that is a serious problem.

Most adult AED pads have a lifespan of roughly two to five years, depending on the manufacturer and how the device is stored. Pediatric pads follow the same principle — and if your setting includes children (a school, daycare, gym, or community center), having in-date pediatric pads available is an important part of your AED program.

The expiration date is printed on the pad packaging. Check it.

AED Batteries: The Hidden Risk

AED batteries degrade over time even if the device is never used. Many AEDs run periodic self-tests in the background, which draw down the battery gradually. Others simply lose charge through normal chemical aging.

Most AED batteries have a service life of two to five years. Some last longer, depending on the model and how frequently the unit runs self-checks. But here is the risk: a battery can appear fine right up until it is not. An AED that fails to power on during a cardiac emergency — because nobody tracked the battery life — is not a resource. It is a false sense of security.

Battery expiration dates are typically printed on the battery itself or listed in the device manual. When in doubt, check the manufacturer's guidance for your specific model.

What Happens If You Use Expired Components?

Using an AED with expired pads or a failing battery is not a minor inconvenience — it can mean the device does not perform as intended during a life-threatening emergency. Possible consequences include:

• Pads that do not adhere properly to the patient's skin

• Inaccurate heart rhythm analysis

• A weakened or failed shock delivery

• A device that does not power on at all

Sudden cardiac arrest has a narrow survival window. Brain damage can begin within minutes of cardiac arrest. An AED that underperforms — or fails entirely — during that window is a loss that did not have to happen.

How to Check If Your AED Is Ready

AED inspection does not require special equipment or technical training. A basic readiness check takes a few minutes and covers the essentials:

• Status indicator — Most AEDs display a visual ready signal (a green checkmark or steady light). If the indicator shows a warning, fault, or nothing at all, the device needs immediate attention.

• Pad expiration date — Check the packaging for the printed date. Replace pads before they expire, not after.

• Battery status and expiration — Confirm the battery is seated correctly and note the expiration date.

• Rescue kit supplies — Check for gloves, a barrier mask, scissors, and a razor if your setup includes them.

• Physical condition — Look for damage, moisture, dust, or signs that the case has been opened without documentation.

Keep a simple log. Write down the date of each check and who did it. This takes thirty seconds and creates an accountability trail that matters — especially in workplace settings where AED maintenance may be a compliance consideration.

How Often Should You Inspect Your AED?

Always follow the manufacturer's specific guidance for your device. As a practical baseline, many organizations use this schedule:

• A quick visual check at least monthly — confirm location, status indicator, and visible condition

• A full documented inspection monthly — pads, battery, accessories, log entry

• Immediate inspection and pad replacement after any use

• Component replacement before — not after — expiration dates pass

One important workplace tip: assign a specific person to be responsible for AED checks. When everyone is responsible, no one is responsible. Putting a name on it changes that.

Common AED Maintenance Mistakes

These are the situations that come up again and again — and all of them are preventable:

• "It's on the wall, so it must be fine." — Mounting an AED is not the same as maintaining it. A device that has not been checked in two years may look identical to one that was inspected last week.

• Not tracking expiration dates — Pads and batteries expire quietly. If nobody is watching the calendar, they will expire unnoticed.

• Forgetting pediatric capability — Schools, gyms, churches, and childcare settings need to confirm they have the right pads available for younger patients.

• Poor storage conditions — Heat, humidity, direct sunlight, and cold can all shorten the service life of an AED and its components. Location matters.

• Skipping the inspection log — No documentation means no way to confirm the device was actually checked, and no accountability if something is missed.

How CPR Safety 411 Can Help

At CPR Safety 411, we work with workplaces, schools, childcare providers, churches, gyms, and community organizations across Pennsylvania to help them build AED programs that are actually ready — not just installed.

That includes helping organizations select the right AED for their environment, understand replacement part schedules, and train their staff to respond with confidence. Our CPR and AED training courses cover not just how to use an AED, but how to recognize cardiac arrest, start CPR immediately, and coordinate a response — the full picture of what actually happens in an emergency.

We also offer on-site training for teams who want to train together at their location — a practical option for workplaces and organizations that need to certify multiple staff members at once.

For general guidance on CPR, AED use, and emergency preparedness, visit our CPR Resources section.

The Bottom Line

AEDs save lives — but only when they are ready to work. The device on your wall is not a decoration or a liability checkbox. It is a piece of emergency equipment that depends on in-date pads, a healthy battery, and regular inspection to perform when someone needs it most.

Take a few minutes today to check your AED. Look at the status indicator. Find the expiration dates on the pads and battery. Make sure the accessories are there. Write it down. If anything is out of date or unclear, address it now — not during an emergency.

And if your team has not been trained on how to use it, that is the next step. Reach out to us about on-site training or explore our CPR and AED certification courses — because a ready device and a ready team together are what make an AED program worth having.