Replacing your AED pads or battery
AED pads and batteries expire on a fixed schedule whether the device is ever used or not, and they are the single most common reason an AED fails when it is needed. In the largest published analysis of FDA-reported AED events, 40,787 cases, batteries accounted for 23.2 per cent of failures and pads and connectors for 23.7 per cent, so 46.9 per cent of all AED failures are consumables (DeLuca et al., Annals of Emergency Medicine, 2012, PMID 21872969). Below is every current replacement part with its price and service life, verified against seller product data on 12 September 2026.
| Model | Adult pads | Battery | Pediatric option | 10 year consumable cost |
|---|---|---|---|---|
| Philips HeartStart OnSite | M5071A $99.00, 2 years | M5070A $249.00, 4 years | Separate M5072A cartridge, prescription only | About $894 |
| Philips HeartStart FRx | SMART Pads II 989803139261 $89.00, 2 years | M5070A $249.00, 4 years | Infant/Child Key $139.00, reusable | About $854 |
| ZOLL AED Plus | CPR-D Padz 8900-0800-01 $230.00, 5 years | Lithium set of 10 $100.00, 5 years | Pedi-padz II $155.00, 2 years | About $330, the lowest we track |
| ZOLL AED 3 | CPR Uni-padz 8900-000280-01 $234.00, 5 years | 8000-000696 $201.00, 5 years | None needed, Uni-padz cover children | About $435 |
| Defibtech Lifeline | DDP-100 $75.15 | DBP-1400, part DCF-200 $229.10 | DDP-200P $130.25 | About $530 |
| Defibtech Lifeline VIEW | DDP-2001 $83.05 | DCF-2003 $240.45 | DDP-2002 $136.40 | About $813 |
| HeartSine Samaritan PAD | Pad-Pak-01 $236.00, pads and battery in one cartridge | Included in the Pad-Pak, there is no separate battery | Pediatric Pad-Pak PAD-PAK-02 $279.00 | About $472 |
| Cardiac Science Powerheart G5 | XELAED001C $88.00 | XBTAED001A $495.00, 4 years | XELAED003C $127.00 | About $1,342, the highest we track |
| Physio-Control LIFEPAK CR2 | Quik-Step 11101-000021 $196.00, adult and child in one set | LIFEPAK CR2 lithium battery $341.00, about 4 years | None needed, the Quik-Step set covers children | Not published per part |
Prices verified against the public product data of AED Leader on 30 September 2026. Service life is the manufacturer figure where one is published; where it is not, check the expiry date printed on the part itself. Ten year consumable cost is our own calculation from those part prices and service lives.
Three things owners get wrong
- Buying the wrong Philips pad. The FRx uses SMART Pads II, part 989803139261. SMART Pads III belong to the FR3, a different device. The OnSite uses M5071A and the two are not interchangeable.
- Assuming the pediatric part is optional. On a ZOLL AED Plus, Pedi-padz II cost $155.00 and last two years, which is about $775 across a ten year life. On a ZOLL AED 3 or a LIFEPAK CR2 the pads already cover children and that cost is zero.
- Tracking the wrong date. HeartSine combines the pads and battery into one Pad-Pak cartridge, so there is a single expiry to track. Every other model here has two parts on two separate clocks.
Full replacement schedule by model is on our AED pads and batteries page. If you are still choosing a device, the ten year running cost is usually a bigger number than the discount you are negotiating: see every AED brand ranked by price and ten year cost.
An AED beeping usually means it found a small problem during its self-test. These checks happen regularly. They make sure the unit stays operational and ready for emergencies. It often means routine maintenance is needed, such as a new battery or pads, but treat it as urgent until the device passes its self-test again. AEDs monitor many components, so finding the alert’s exact cause may require a closer look.
Possible reasons for a defibrillator beeping
A defibrillator beeps periodically to signal that it needs attention. This alert appears often. It highlights a small issue or maintenance need that you shouldn’t overlook. In most cases, the cause is linked to a handful of common and easily identifiable issues.
Low/Expired Battery
A common cause of AED beeping is a weakening or nearly depleted battery. The device uses this alert to remind you when to replace it. This keeps it fully powered and reliable in important situations.
Chirp frequency differs by AED model. For example, the ZOLL AED Plus beeps every 60 seconds when the battery is low. The Philips HeartStart OnSite beeps every 30 seconds in this situation.
Expired Electrode Pads
AED electrode pads last about two to five years. This is because the conductive gel slowly dries out. When this occurs, adhesion may weaken in an emergency. So, timely replacement is crucial for safe use.
An AED warns you when its electrode pads are close to expiring. This gives you time to replace them before they can’t be used.
Out-of-Date Software
A defibrillator may emit a beep to indicate that a software update is required. For Wi-Fi capable models, updates are usually quick. If you have questions, check with the manufacturer.
Disconnected Electrode Pads
Keeping the electrode pads connected helps the AED run its self-tests and stay ready. If the pads are loose or disconnected, the device will trigger an alert to signal the issue.
Internal Errors
An AED may also trigger an alert due to internal faults such as software errors or electrical issues. These issues are different from regular maintenance warnings. They can impact how the device works, so fix them quickly.
How do you stop an AED from beeping?
To stop the beeping, you often need to troubleshoot. This helps you find and fix the problem quickly.
Check the AED’s storage conditions. Extreme heat or cold can harm its internal parts over time. Moving the device to a stable, controlled environment often helps prevent such issues.
Check the defibrillator for any visible alerts. Some models show clear warnings, such as “Replace Battery.” Others use error codes that need the manual to understand. On some devices, like the Philips FRx or OnSite, press the blue info button to see the message.
If the screen is blank or unresponsive, running a manual self-test can help identify the issue. On some models, you hold the power button. If there’s a problem, the device may give a voice prompt.
Most AEDs follow a similar method for starting a self-test. On the ZOLL AED Plus, holding the On/Off button for five seconds will begin the process. For models like the Philips FR2, you may need to remove and reinsert the battery. Check your user manual for the exact steps for your device.
If an issue arises, you can take simple steps. Secure the pads, change the battery, or contact the manufacturer for help. The alert will stop once you fix the problem.
How do I turn off my AED alarm?
So what if you’ve identified the issue, but the AED machine keeps beeping and won’t stop? If the AED beeps due to a low battery, it can be annoying. If the new battery won’t arrive for two weeks, that constant chirping will drive you crazy.
Follow your manufacturer’s instructions. A beeping AED has failed or flagged a self-test and may not deliver a shock, so arrange a replacement battery or pads immediately and, if possible, a backup AED so your site stays ready when needed.
An AED cabinet alarm can also cause confusion, as it activates when the door is opened. Closing the cabinet or using the key usually stops the sound. Some alarms will turn off on their own after a short time.
How to prevent your AED from beeping
Regular maintenance keeps your AED from beeping unexpectedly. It also ensures it performs reliably.
- Keep track of your end dates and replace parts as needed.
- Keep your AED in a dry, temperature-controlled location.
- Keep your pads connected to your device.
- Install all new software updates as they become available.
Managing AED maintenance can be tough. A dedicated program is a smart solution. Services provide alerts, replacement supplies, and expert support. This keeps your device ready at all times.
Don’t ignore an AED’s beeping. It’s an important alert that the device may not be ready for use in a cardiac emergency.
FAQs
Why is my AED beeping?
An AED beeping often means there’s a maintenance issue. This could be a low battery, expired pads, or a system alert found during self-tests.
How do you stop an AED beeping?
To stop an AED from beeping, check for issues. Look for loose pads, a low battery, or error alerts. Fix these problems with simple troubleshooting or by replacing parts.
Is an AED still safe to use if it is beeping?
Not reliably. A beeping AED has failed or flagged a self-test and may not deliver a shock. Follow the manufacturer’s instructions and replace the battery or pads right away.
What does a beeping pacemaker mean?
A beeping pacemaker could mean a low battery, a problem with the device, or that you need a check-up. It’s important to see a medical professional for evaluation.
Should I worry about a pacemaker beeping sound?
Don’t ignore a beeping pacemaker. It can signal important alerts about device performance or battery status.
How often should I check my AED to prevent beeping?
Monthly inspections, like checking battery status and pad expiration, stop unexpected AED beeping alerts.
Conclusion
In conclusion, when an AED beeps, it’s a vital alert. This sound helps keep your device working well, so don’t ignore it. Most alerts come from routine maintenance. They often involve battery replacement, pad expiration, or minor system checks. These issues can be fixed quickly with the right attention. Stay proactive with regular inspections and quick alerts. This keeps your AED reliable and ready when every second counts.
