AED Pads & Batteries by Model: Complete Compatibility Guide

Every AED uses model-specific electrode pads and batteries. Pads from one model will not work in another, even from the same manufacturer — and ordering the wrong part is the most common mistake we see. This guide lists the exact replacement parts for every AED we carry, so you can match your device once and reorder with confidence.

How to identify your model: look at the front label of the device, or the label on the back near the battery compartment. The model name is printed there — for example "AED Plus", "HeartStart OnSite", or "LIFEPAK CR2". If you cannot find it, call us at 888-541-2337 and we will identify it from a photo.

Compatibility chart — all models

Part numbers verified against our live catalog. Scroll the table sideways on mobile.

Two models above are marked supply tightening and one discontinued. Parts for these move in and out of availability — see our AED end-of-life and parts availability guide for where each model stands, reviewed monthly.

Model-specific guides

In-depth guides for every model we carry — part numbers, shelf life, pediatric handling and the ordering mistakes we see most often.

Three compatibility rules worth knowing

1. Pads are rarely cross-compatible. The one real exception is ZOLL: CPR-D-padz, Stat-padz II and Pedi-padz II fit both the AED Plus and the AED Pro. Everything else is model-specific — the AED 3 takes Uni-padz only, Philips OnSite pads do not fit an FRx, and Defibtech VIEW pads do not fit a standard Lifeline.
2. Some models bundle pads and battery together. HeartSine's Pad-Pak and the LIFEPAK CR Plus Charge-Pak are each a single part containing both, with one expiration date. Simpler to track — but an expired battery forces a pad replacement and vice versa.
3. Pediatric coverage works three different ways. Separate pediatric pads (ZOLL AED Plus/Pro, Philips OnSite, Powerheart, Defibtech, LIFEPAK 1000); an Infant/Child Key with the adult pads left in place (Philips FRx); or one universal electrode covering every patient (ZOLL AED 3, LIFEPAK CR2).

How often to replace

Pads generally run 2 to 5 years and batteries 2 to 5 years in standby, but the interval varies by model — and both should be replaced immediately after any deployment, even one where no shock was delivered. For the full brand-by-brand breakdown, see how often you should replace AED pads and batteries.

When you buy pads or a battery from us, we contact you 90, 60 and 30 days before they expire, so a lapse never takes you by surprise.

Related guides

• How often should you replace AED pads and batteries?
• Can you use expired AED pads? What actually happens
• Why is my AED beeping? Chirp codes by brand
• Is my AED discontinued? 2026 end-of-life & parts availability
• Powerheart G3 is discontinued — what to replace it with
• The complete AED maintenance checklist
• Shop everything by AED unit

Frequently asked questions

Can I use pads from a different AED model?

Almost never. AED electrode pads are engineered for a specific device and connector. The main exception is ZOLL, where CPR-D-padz, Stat-padz II and Pedi-padz II fit both the AED Plus and the AED Pro. Always order by your exact model name.

Do AED pads and batteries expire if they are never used?

Yes. The conductive gel in the pads dries out and the electrodes corrode over time, and batteries drain in standby as the AED runs its self-tests. Both carry printed expiration dates that apply whether or not the device has been used.

What do I replace after using my AED in a rescue?

Always replace the pads, even if no shock was delivered. Depending on how long the device was running, the battery may also need to be evaluated or replaced.

Does my AED need separate pediatric pads?

It depends on the model. ZOLL AED Plus and Pro, Philips OnSite, Powerheart, Defibtech and LIFEPAK 1000 units use separate pediatric pads; the Philips FRx uses an Infant/Child Key; and the ZOLL AED 3 and LIFEPAK CR2 cover both patient sizes from one electrode set.

Last reviewed: 20 August 2026. Part numbers are checked against our live catalog. Replacement intervals are general guidance — always follow the expiration date printed on your specific pads and battery.