- •One of the simplest and most affordable AEDs: two buttons, clear voice prompts, and an active status indicator you can check at a glance.
- •Battery choice fits your maintenance plan: 5-year or 7-year battery options.
- •FDA-approved via PMA (P160032). See all Defibtech models or refurbished options.
Verdict: The Defibtech Lifeline (DDU-100) is the set-and-forget budget AED, FDA-approved under PMA P160032[1]. Its standout is a 7-year battery option, the longest standby interval in the mainstream market, which means the fewest maintenance touches of any full-size AED. Buy it for a low-traffic site that wants a credible device and almost nothing to track. Step up to the Lifeline VIEW if responders would benefit from an on-screen rescue video.
Decision shortcut
Buy the Lifeline for a low-traffic site, a second unit, or any place where the priority is a budget AED you can mount and mostly forget, thanks to the 7-year battery.
Buy the Lifeline VIEW if an untrained rescuer would do better watching a video than listening to prompts.
Step up to the ZOLL AED Plus if trained responders need real-time CPR depth feedback.
Defibtech Lifeline AUTO AED review: the fully automatic version
Short answer: the Lifeline AUTO (model DDU-120) is the fully automatic Lifeline. After it warns the rescuer to stand clear, it delivers the shock itself. The standard Lifeline (DDU-100) is semi-automatic and asks the rescuer to press the shock button. Everything else is shared: IP54 rating, 4.2 to 4.4 lb, a 5-year DBP-1400 or 7-year DBP-2800 battery, adult DDP-100 and child DDP-200P pads, FDA approval under PMA P160032 and an 8-year Defibtech AED warranty.
AED Leader and Response Ready sell both versions in one listing at $1,478.80 to $1,659.15, depending on automation and battery (checked 1 October 2026). Pick the AUTO where the likely responder is an untrained bystander who may hesitate at a shock button. Pick the semi-automatic where trained staff want control of the shock. Need a screen? Read our Defibtech Lifeline VIEW review.
Check the Lifeline AUTO price at AED Leader · Response Ready for 5 or more units
Sources: Defibtech Lifeline AUTO specification sheet · Lifeline specification sheet · Defibtech warranty statement · FDA PMA P160032.
Who should buy the Lifeline, and who should not
The Lifeline exists for the buyer who wants a real, FDA-approved AED at the low end of the price range and does not want an ongoing maintenance chore. That is low-traffic offices, small retailers, second or third units in a distributed program, community facilities, and budget-conscious homes. Its simplicity and long battery are the whole pitch: mount it, check the indicator occasionally, and replace consumables rarely.
It also fits program managers adding coverage on a budget across many sites, because the 7-year battery cuts the replacement calendar to a minimum. For the broader Defibtech range, see our Defibtech AED lineup.
Skip the Lifeline if any of these apply
Your responders would do better with a screen. The Lifeline coaches with voice only. The Lifeline VIEW adds a full-color video display for the same rescue.
You want fully automatic shock delivery. The DDU-100 is semi-automatic; Defibtech sells the separate Lifeline AUTO for hands-off shock delivery.
Your team drills on CPR quality. The Lifeline does not measure compression depth. That tier starts with the ZOLL AED Plus.
Defibtech Lifeline AED review: the short verdict
The Lifeline is the simplest AED to keep rescue-ready: two buttons, a battery that lasts up to seven years, and pads on a two-year cycle. It does not measure compression depth, so gyms that want live CPR feedback should look at the ZOLL AED Plus instead. Price checked 18 September 2026: $1,478.80 at AED Leader, against $1,523 at AED Superstore.
The Lifeline advantage: the market’s longest battery
Most AEDs run a 4-year standby battery, so a typical program budgets a battery swap roughly every four years on top of pad replacements. The Lifeline offers a 7-year battery option (model DBP-2800) alongside the standard 5-year pack[2]. Seven years is the longest standby interval in the mainstream category, and for a device that may sit unused for its entire life, that translates directly into fewer readiness failures and fewer maintenance events. The most common reason an AED is not rescue-ready is an expired consumable nobody tracked, and a 7-year clock is the simplest defense against it.
The rest of the device is honest and simple. It is a semi-automatic unit that talks the rescuer through the sequence with extensive voice prompts, weighs about 4.2 to 4.4 pounds depending on battery, and carries an IP54 rating (dust protected, splash proof)[2]. The American Heart Association reports that immediate bystander CPR can double or triple survival from cardiac arrest[3], and the Lifeline is built so an untrained person can act inside that window.
What the Lifeline costs to own
The Lifeline is one of Defibtech’s budget-priced options: $1,478.80 at AED Leader on 18 September 2026 for the semi-automatic, 5-year battery build, rising to $1,659.15 for fully automatic with the 7-year battery (configuration table on the Lifeline product page). The ownership story is really about the consumables, and this is where the 7-year battery earns its keep.
Maintenance math (why the 7-year battery matters)
With the 7-year battery, a unit that is never deployed needs essentially one battery event across seven years, plus pad replacements on the pads’ own cycle. Against a typical 4-year battery, that is close to half the battery replacements over the same period.
Assumptions: no rescue deployment (any use means an immediate pad replacement), pads replaced on their printed expiration, and current consumable pricing confirmed with your seller. Run your unit count in our AED cost calculator.
| Line item | AED Leader price, 18 Sep 2026 | Events in 5 years | 5-year cost |
|---|---|---|---|
| Device, semi-automatic, 5-year battery (DCF-A100-EN) | $1,478.80 | once | $1,478.80 |
| Adult pads DDP-100, 2-year cycle | $75.15 | 2 sets in 5 years | $150.30 |
| Battery DBP-1400, 5-year standby | $229.10 | 1 at year 5 | $229.10 |
| Five-year total, 5-year build | $1,858.20 | ||
| Same unit with the 7-year battery (+$56.65 at purchase) | $1,535.45 | no battery event in 5 years | $1,685.75 |
Sourced calculation: AED Leader listing and Store API prices on 18 September 2026, no rescue deployment, pads replaced at their two-year use-by. The 7-year battery option costs $56.65 more on day one and saves $229.10 inside the five-year window, a net $172.45 in its favor. Cabinet ($135.15) and training are extra on every row.
How the Lifeline compares
Most Lifeline shoppers weigh it against its own sibling, the video-screen VIEW, and the budget HeartSine 350P. All are FDA-approved through the PMA process, so the real differences are coaching style, maintenance interval, and price, not regulatory standing.
| Device | Coaching | Battery standby | Ingress | Pediatric |
|---|---|---|---|---|
| Defibtech Lifeline | Voice prompts | Up to 7 years | IP54 | Child/infant pads |
| Defibtech Lifeline VIEW | Color video + voice | 4 years | IP55 | Child/infant pads |
| HeartSine 350P | Voice prompts | ~4 years (Pad-Pak) | IP56 | Pediatric Pad-Pak |
The read: the Lifeline wins on maintenance interval and price for a set-and-forget install. The VIEW wins when a rescuer benefits from a screen. The HeartSine 350P wins on the highest ingress rating and a single-cartridge consumable. For the full field, see our best AED guide.
Defibtech Lifeline specifications
| FDA status | Approved via PMA P160032 |
| Model | DDU-100, semi-automatic (Lifeline AUTO is the fully automatic variant) |
| Weight | About 4.2 lb (5-yr battery) to 4.4 lb (7-yr battery) |
| Ingress rating | IEC 60529 IP54, dust protected, splash proof |
| Battery standby | 5 years (DBP-1400) or 7 years (DBP-2800) |
| Shock energy | 150 J adult; 50 J child/infant |
| Pediatric | Child/infant pads (DDP-200P) for under 8 years or under 55 lb |
Specifications per Defibtech product documentation[2]. Confirm the current spec sheet and configuration before purchase.
Recertified AEDs from $875: the 7 models that sell
Same FDA-approved (PMA) hardware for 38% to 58% less than new, each with a 3-year seller warranty at AED Leader. Prices checked 4 October 2026.
| Recertified model | Price | New | You save | Buy |
|---|---|---|---|---|
| Philips OnSite recertified | $875 | $714 (45%) | Check price | |
| Philips FRx recertified | $875 | $1,224 (58%) | Check price | |
| ZOLL AED Plus recertified | $875 | $1,207 (58%) | Check price | |
| ZOLL AED 3 recertified | from $1,150 | $1,249 (52%) | Check price | |
| HeartSine 450P recertified | $875 | $886 (50%) | Check price | |
| HeartSine 350P recertified | $875 | $536 (38%) | Check price | |
| Powerheart G5 recertified | $1,225 | $932 (43%) | Check price |
Buying 5 or more? Response Ready handles fleet orders. Compare all of them in the best refurbished AEDs.
Frequently asked questions
How long does the Defibtech Lifeline battery last?
Five years standby for the standard DBP-1400 pack and seven years for the high-capacity DBP-2800, per Defibtech, with the 9-volt monitoring battery installed. The 5-year pack is rated for 125 shocks or 8 hours of operation, the 7-year pack for 300 shocks or 16 hours. Replacement DBP-1400: $229.10 at AED Leader (18 September 2026).
Who manufactures Defibtech?
Defibtech LLC, a privately held company based in Guilford, Connecticut, designs and manufactures the Lifeline family (Lifeline, Lifeline AUTO, Lifeline VIEW, Lifeline ECG and Lifeline PRO). It is not part of Philips, ZOLL or Stryker.
Which AED defibrillator is best?
It depends on who will use it. For untrained bystanders the Philips OnSite (voice coaching, no prescription) and the Lifeline AUTO (two buttons, fully automatic) are the simplest. For gyms and trained staff the ZOLL AED Plus adds real-time compression depth feedback. Our ranked list is on the best AED page, or answer six questions in Find Your Perfect AED.
What is the best home AED to buy?
The Philips HeartStart OnSite, because it is the only AED sold without a prescription in the United States ($1,589 new, $875 recertified at AED Leader, 18 September 2026). The Lifeline is a sound second choice for a home with a trained adult, and its 7-year battery means fewer replacements. See AEDs for home.
Is the Defibtech Lifeline FDA approved?
Yes. The Defibtech Lifeline holds FDA premarket approval under PMA P160032[1], the agency’s most rigorous device pathway. Verify the record in the FDA PMA database linked in the references, and compare it against the rest of the Defibtech lineup.
How long does the Lifeline battery last?
You choose at purchase: a 5-year pack (DBP-1400) or a 7-year pack (DBP-2800)[2]. The 7-year option is the longest standby interval in the mainstream market and the reason the Lifeline is such a low-maintenance choice.
Lifeline vs Lifeline VIEW: which should I buy?
Buy the standard Lifeline for the lowest price and longest battery when voice coaching is enough. Buy the Lifeline VIEW if an untrained rescuer would do better watching a full-color rescue video. Our Find Your Perfect AED quiz maps your site to one in about a minute.
Can the Lifeline be used on children?
Yes, with the child/infant pads (DDP-200P) for patients under 8 years or under 55 pounds, which lower the delivered energy to 50 joules[2]. Facilities serving children should also read our AEDs for schools guide.
Is a refurbished Lifeline a safe way to save?
It can be, if the reseller documents a full recertification, fresh pads, a current battery, and a written warranty. The model’s PMA approval does not change with age, but an individual used unit is only as safe as its inspection and consumables. Our refurbished AED guide covers how to vet a seller.
Is the Lifeline semi-automatic or fully automatic?
The DDU-100 Lifeline is semi-automatic: it advises a shock and the rescuer presses the button. If you want hands-off delivery, Defibtech makes a separate fully automatic model, the Lifeline AUTO.
The bottom line
The Defibtech Lifeline earns its place as the low-maintenance budget AED: a credible, PMA-approved device whose 7-year battery option means the fewest readiness touches of any full-size unit. It will not coach with a screen or measure compression depth, but for a low-traffic site or a second unit on a budget, the trade-offs are the right ones.
Next steps: check current pricing and package options on our Defibtech Lifeline product page or the Lifeline AED package with cabinet, run your numbers in the AED cost calculator, or answer a few questions in the Find Your Perfect AED quiz to confirm the Lifeline fits your site.
References
1. US Food and Drug Administration, Premarket Approval (PMA) database, record P160032, Defibtech Lifeline AEDs. accessdata.fda.gov
2. Defibtech, Lifeline AED (DDU-100) official product and specification page. defibtech.com
3. American Heart Association, CPR facts and resources on bystander CPR and survival. heart.org
Get the Defibtech Lifeline at the right price
You have read the full breakdown. If the Defibtech Lifeline fits your setting, see current 2026 pricing, stock, and the exact pads and battery it needs on one page.
