What “UL Listed” Really Means for Battle Born Batteries

In our companion article, Battery Safety By Design, we focused on the features built into Battle Born Batteries that help make them safe in the first place. This article looks at the next part of the story: how these safety features are verified by internationally recognized standards, what "UL Listed" means for a lithium battery, testing requirements, and regular inspection. 

For Battle Born, that means checking battery quality at multiple stages, validating performance and safety through nationally-recognized third-party certification, and continuing to learn from years of real-world use across RV, marine, and off-grid applications.

In other words, we did not stop at designing a safe battery. The batteries also have to be tested, checked, and validated for the kinds of conditions they actually see in service.

Battery Safety Has to Be Proven, Not Just Claimed

Battery safety is not just about whether a battery works under ideal conditions. It is about how that battery behaves in real RV, marine, and off-grid use, where vibration, temperature swings, high loads, daily cycling, and installation quality all matter.

For Battle Born, that proof comes from safe design, manufacturing consistency, third-party certification testing, and real-world analysis. For example, Battle Born’s 100Ah models are ETL listed by Intertek to UL 2054 and IEC 62133 standards and remain subject to ongoing factory surveillance.

But what do these certifications and listings mean? What kinds of tests do these certifiers do, and why should you trust them?

“UL Listed”: Certifications and Listings Explained

The term “UL Listed” is often used as a catch-all phrase, but it does not always mean the exact same thing. UL literally stands for Underwriters Laboratories, the name of a laboratory long associated with some of the most recognizable electrical safety standards in the U.S. 

Sometimes “UL Listed” means a product actually carries a UL Listing Mark, meaning they tested and certified the product. Other times, people use it more loosely to mean a product was evaluated to a UL safety standard by an outside testing lab. 

In either case, the important question isn’t just WHO tested it, but WHAT standard it was tested to.

WHO?

If you have ever flipped over a charger, inverter, appliance, or other electrical device, you have probably seen a cluster of marks and abbreviations on the label.

Some of those marks come from OSHA’s Nationally Recognized Testing Laboratories, or NRTLs - more on these guys later. Other marks reflect manufacturer declarations made under legal compliance frameworks

Here are some of the best-known NRTLs in the U.S.:

• Underwriters Laboratories (UL listing mark and standards ecosystem)

• Intertek (ETL mark)

• CSA Group / Canadian Standards Association

• TÜV Rheinland

WHAT?

Some standards relate to product safety in use, while others relate to shipping, environmental sealing, or market access in specific regions. That is part of what makes certification language confusing for buyers, as different standards and certifications are not the same or have the same level of testing.

The important thing to understand is that these marks are generally about safety and compliance, not performance. 

They do not tell you how long a battery will last, how much energy it will deliver in your exact setup, or whether it is the best value for your application. However, these marks do tell you whether a product meets defined requirements for things like electrical safety, misuse conditions, transport, or enclosure protection.

Common Safety Marks and Acronyms

Here are some of the common marks you will see on electrical devices and what they actually mean:

NRTL Verified Vs. Self-Declaration

In the United States, when a product carries an NRTL certification mark, OSHA says that means the NRTL tested and certified the product to one or more applicable product safety standards. OSHA also notes that each recognized NRTL has its own registered certification mark and its own scope of recognized test standards. That is the bucket for language like ETL Listed, UL Certified, or other third-party certification marks tied to an outside lab.

By contrast, a CE marking is primarily a manufacturer-responsibility framework. The European Commission states that the manufacturer is responsible for carrying out the conformity assessment, setting up the technical file, issuing the EU declaration of conformity, and affixing the CE mark. 

The EU also makes clear that there is no central EU body that gives a blanket “CE certificate” allowing use of the mark. In other words, CE is not the same kind of third-party safety listing as an NRTL mark. It is a legal declaration of conformity backed by documentation and manufacturer responsibility.

A simple way to think about it is this:

• Third-party verified: ETL, UL, CSA, LC, and other certification marks tied to an outside lab and a defined standard.

• Manufacturer-declared: CE, RoHS, REACH-style conformity documents, unless the applicable law requires notified-body involvement.

• Transport compliance: UN 38.3 is its own category. PHMSA requires lithium batteries to pass the UN 38.3 design tests, and it requires manufacturers and distributors to make the test summary available downstream.

What Do NRTLs Actually Do?

At a high level, an OSHA NRTL evaluates whether a product meets a defined safety standard. That usually means:

1. Representative samples are submitted to the NRTL

2. The lab runs the required tests for that standard

3. The product either passes or fails. 

4. If it passes, the manufacturer is authorized to apply the certification mark associated with that lab and standard.

These evaluations are not simple, quick, or cheap. They are also not designed to prove that any product performs its task as advertised. Instead, they answer a harder safety question: 

Does the product behave safely and predictably under the fault, abuse, and misuse scenarios covered by the standard? 

That is why these standards matter. They push the product outside ideal conditions and look closely at how it responds.

Certification Maintenance and Relisting

Additionally, these certifications aren’t one-time test events. 

In practice, listed products are maintained through ongoing follow-up surveillance, including factory inspections and review of changes that could affect compliance.

Any product changes that affect the certified design require relisting.

For Battle Born’s 100Ah products specifically, the Intertek listings to UL 2054 and IEC 62133 are maintained under ongoing factory surveillance. And Intertek performs random biannual inspections of the manufacturing facility. 

Certification only retains value if production continues to match the originally-tested design. That is one reason we have kept this battery design in place for so long: it has proven its safety again and again. 

Why Do Companies Bother Getting Certified?

Because certification is about more than adding a badge to a label. It is one of the clearest ways a company can show that its product has been evaluated to a recognized safety standard, rather than simply asking customers to take its word for it. 

While you, as a consumer, have the right to purchase whatever product you want, many times insurance, especially in commercial applications, requires that all products used in construction be certified to a national standard by an NRTL. In some commercial or insured applications, unlisted products can create major approval, compliance, or insurance-claim problems.

Why Battle Born Got Certified

Getting our batteries certified was especially important early in the RV lithium market.

It is easy to forget now, but when Battle Born entered the market, many RV manufacturers left battery selection and installation to dealers. Dealers often added generic lead-acid batteries on site, rather than original equipment manufacturers (OEMs) integrating the battery as a more engineered part of the RV system. 

As lithium entered RV applications, that started to change. Manufacturers increasingly had to evaluate the battery itself, plan for its installation, understand what it could power, and confirm that it met recognized safety standards.

In that environment, Battle Born had to do more than introduce a new chemistry. We had to prove that lithium could be safe, credible, and ready for real-world RV use. As lithium batteries began entering OEM RV designs, NRTL listings became critical. In the RV industry, the RV Industry Association (RVIA) standards framework requires member manufacturers to use products that meet applicable listing requirements for factory-installed components. That requirement pushed lithium batteries to secure the right listings before OEMs could use them in factory builds.

In short, companies pursue certification because it helps them build trust, support adoption, and prove that a product meets real safety standards, not just marketing claims.

Battle Born Certifications And What They Mean

So what do those standards actually look like in practice? Let’s break down the specific certifications we reference and the safety conditions they evaluate.

One important reminder before we start: different standards apply to different products, use cases, and certification boundaries. 

In other words, “UL Listed” does not mean the same thing for every product or battery. You have to look at the actual standard behind the mark to understand what it tested and why. Some standards focus on portable batteries or individual cells, while others cover finished battery packs. Still others address transport, enclosure protection, or special applications.

These are the certifications currently held across Battle Born battery models*:

*Certifications are model-specific and may vary by product. Please refer to the individual product page and battery manual for the certifications that apply to a specific battery.

UL 1642 | Lithium Cell Safety

Scope

UL 1642 is a safety standard for individual lithium cells. It applies at the cell level rather than the finished battery-pack level, which is why it is best thought of as an upstream safety standard for the cells inside the battery.

Safety Tests

UL 1642 evaluates lithium such as:

• Short circuit

• Overcharge

• Crush and impact

• Temperature exposure

These kinds of abuse tests are intended to confirm that the individual cells can withstand stress without becoming unsafe.

Purpose

The purpose of UL 1642 is to evaluate the safety of the individual lithium cells used as the building blocks inside a battery. It does not replace pack-level standards like UL 2054, but it helps illustrate the difference between cell-level safety and finished-battery safety.

UL 2054 | Battery Pack Safety Certification

Scope

UL 2054 is a safety standard for a fully assembled battery pack used in household and commercial products. In plain terms, it looks at the finished battery a customer actually buys, including the electronics, enclosure, and internal protection systems, not just the raw cells inside it. 

Safety tests

UL 2054 safety testing can include things like:

• short circuit

• Short circuit with internal safety removed*

• abnormal charging

• abusive overcharge

• forced discharge

• limited power source

• battery pack component temperature

• battery pack surface temperature

• steady-force

• mold-stress relief

• drop-impact testing

It also requires lithium-ion cells to comply with UL 1642 (the lithium cell standard we just discussed above). These are safety and abuse tests, not performance tests. They are meant to see how the battery behaves when conditions are not ideal.

Purpose

The purpose of UL 2054 is to evaluate the safety of the complete battery pack, not just individual cells. That matters because customers are not buying loose cells. They are buying a finished battery that needs to behave safely as a complete product under abnormal conditions, as well as normal use.

This is one reason UL 2054 is meaningful in the RV, marine, and off-grid world. It is asking whether the finished battery pack responds safely under fault and abuse conditions, not just whether it delivers power. 

*For Battle Born specifically, our 100Ah models are listed by Intertek to UL 2054. In the standard’s most severe electrical test, the battery management system is deliberately bypassed or dead-shorted, and the pack is subjected to a direct short circuit. Battle Born passed that test without fire, with the positive terminal serving as a last-resort passive protection feature.

UL 62133-2 / CSA C22.2 No. 62133-2 | Lithium Battery Cell & Pack Safety

Scope

UL 62133-2 is a lithium battery safety standard for portable sealed secondary lithium cells and batteries under intended use and reasonably foreseeable misuse. In simpler terms, it focuses on whether a lithium battery can be used, charged, handled, and even misused in expected ways without becoming unsafe. 

Safety tests

UL 62133-2 testing includes electrical, mechanical, thermal, and fault-condition safety checks. In practical terms, that includes things like:

• Case stress at elevated temperatures

• External short circuit protection

• Free-fall drop testing

• Controlled overcharge conditions

• Transportation vibration simulation

• Mechanical shock testing

These evaluations are meant to verify structural integrity and safe electrical behavior during charging, use, and handling.

Purpose

To show that lithium battery cells and packs can be used and misused in expected ways without becoming a fire or explosion hazard. It is a portable-battery safety standard, but it is still highly relevant in mobile and off-grid applications because those batteries are exposed to vibration, charging events, and real-world physical stress.

A Note About UL 1973

You may also see UL 1973 mentioned in the battery market, especially for larger energy storage products. UL 1973 covers batteries used in stationary and motive auxiliary power applications. That includes things like stationary energy storage systems and vehicle auxiliary power roles, not traction batteries. In other words, it is a more direct fit for many modern house-power and energy-storage applications than older portable-battery standards are.

That is part of why you now see UL 1973 referenced more often in the battery industry. It has become a clearer match for larger stationary and auxiliary-power battery systems.

Battle Born does not have UL 1973 for any of our batteries (yet). That does not mean the batteries failed UL 1973. The more accurate way to explain it is that our batteries were already certified to other recognized battery safety standards before UL 1973 became the market’s most direct fit for this use case. That is why it is important not to assume every UL standard means the same thing. Different standards ask different safety questions. 

UN 38.3 | Transportation of Lithium Batteries

Scope

UN 38.3 is the required transport-safety certification framework for shipping lithium batteries by air, land, or sea. It is about safe transport, not day-to-day use in a power system.

Safety tests

UN 38.3 includes transport-focused tests such as:

• Thermal cycling

• Transportation vibration testing

• Mechanical shock testing

• External short circuit simulation

• Overcharge evaluation

These tests intend to confirm that the battery can safely endure the kinds of conditions it may experience during transportation.

Purpose

The purpose of UN 38.3 is simple: safe and legal transport. That makes it different from in-use operating safety standards, but still extremely important. A battery that cannot meet transport requirements cannot be shipped normally through the global supply chain.

In short, companies cannot sell, stock, or move batteries without UN 38.3 through normal distribution channels. 

IP65 | Dust and Water Resistance Rating

IP ratings aren't "UL listings" per se, but are still important. They classify how well an enclosure protects internal components from environmental exposure. In this case, the rating applies to the battery enclosure, not to cycle life or electrical performance.

IP65 means the battery enclosure is rated as dust-tight and protected against water jets. However, it does not mean the battery is designed for submersion.

Scope

IP ratings come from IEC 60529 and apply to the enclosure, not directly to battery performance or cycle life. The goal is to rate how well the enclosure resists dust and liquid intrusion.

The IP code itself is the test shorthand:

• 6 = dust-tight

• 5 = protected against water jets

Purpose

For RV, marine, trucking, and off-grid installs, IP65 matters because batteries often live in compartments that see dust, spray, grime, wash-down, or weather exposure. A dust-tight, water-jet-resistant enclosure gives a battery a better chance of surviving those real-world conditions.

But it is still important to say: IP65 is not a submersion rating. 

Class I, Division 2 Certified | Hazardous Commercial and Industrial

Scope

Class I, Division 2 refers to electrical equipment approved for environments where flammable gases or vapors are not normally present in dangerous concentrations, but could be present under abnormal conditions. Certain hazardous commercial and industrial locations use this classification.

Safety tests

The exact testing depends on equipment and installation requirements, but the goal is to confirm that the equipment is suitable for use where ignitable gases may occasionally be present. Battle Born’s examples include:

• Oil and gas sites

• Methane capture systems

• Industrial energy systems

When installed inside an approved NEMA-rated enclosure, companies can deploy the battery near potential gas sources in these types of environments.

Purpose

Why does this matter? Because some applications require batteries to be in places where even an uncommon spark or hot surface could be a serious issue. Class I, Division 2 suitability helps address those higher-risk applications. For most RV owners, it is not the main certification they will shop by. But for certain industrial, oil-and-gas, or specialty installs, it can matter a great deal.

Simple takeaway

A good way to think about these is:

• UL 2054 = finished battery pack safety, the most stringent standard

• UL 1642 = individual lithium cell safety vs. pack-level standards

• UL 62133-2 = lithium cell and battery safety under expected use and misuse

• UL 1973 = larger stationary / auxiliary-power battery safety

• UN 38.3 = transport safety

• IP65 = enclosure protection against dust and water jets

• Class I, Division 2 = suitability for certain hazardous gas/vapor environments

None of these marks tell the whole story by themselves. But together, they help show how a battery has been evaluated, what kinds of risks were considered, and why those standards matter in the real world.

What These Certifications Mean in Real Life

Certifications matter most when you connect them to actual use. For Battle Born batteries, that means RV, marine, off-grid, and trucking environments where power systems are asked to do more than sit on a lab bench. 

The value of standards like UL 2054, UL 62133-2, IP65, and in some cases Class I, Division 2, is that they line up with real-world risks: enclosed installs, vibration, moisture, heavy cycling, and fault conditions.

For RV Owners

For RV owners, the biggest takeaway is that these batteries are often installed inside or near living spaces, where safe behavior under fault conditions matters just as much as normal operation. That is where standards like UL 2054 and UL 62133-2 matter most. They are designed to evaluate battery safety under abnormal conditions, not just day-to-day use. 

And because RV systems also deal with road vibration, charging events, and high inverter loads, those standards are especially relevant to how house batteries are actually used.

For Marine Applications

In marine environments, the dots connect a little differently. Here, moisture, spray, corrosion, and constant motion all become part of normal life. That makes electrical safety important, but it also makes enclosure protection important. 

An IP65-rated enclosure, for example, helps show that a third-party lab evaluated the battery housing for dust-tightness and resistance to water jets, which is much more meaningful on a boat than it would be for a battery sitting in a dry indoor utility room.

For Off-Grid Systems

For off-grid systems, the biggest takeaway is reliability under long-term, real-world use. Off-grid users often cycle these systems daily, use them to support essential loads, and rely on them as a central part of the power system. That is why battery safety listings like UL 2054 matter. They help verify that the finished battery pack has been evaluated not just for normal operation, but for how it behaves under abnormal and fault conditions. 

And in some commercial or specialty off-grid environments where flammable gas or vapor may only be present under abnormal conditions, Class I, Division 2 suitability can also be extremely important.

For Truckers

In trucking applications, batteries may support sleeper cab loads, auxiliary power, hotel loads, and idle-reduction systems. That means they have to handle vibration, long operating hours, charging demands, and real-world installation conditions day after day. 

Here again, standards like UL 2054 and UL 62133-2 matter because they help show the battery has been evaluated for safe pack-level behavior under the kinds of electrical and physical stresses mobile systems can create. 

In short, these certifications are not just technical paperwork. They are one more way of showing that the battery has been evaluated for the kinds of conditions RVers, boaters, and off-grid users actually put it through.

What No Battery or UL Listing Can Guarantee

Even a well-designed, well-tested battery still depends on the system around it.

No battery can guarantee safe operation if it is installed improperly, paired with the wrong equipment, or used outside its published specifications. A battery is like a fuel tank, and that fuel can be dangerous if it's not controlled properly. 

Installation problems can create heat and stress outside the battery itself. Those are system-level issues, not chemistry-level issues. For example: 

• Undersized cables

• Loose external terminal connections

• Poor crimps

• Incorrect charger or inverter settings

• Missing external overcurrent protection

• Other installation errors

That is why proper installation matters tremendously.

Battle Born batteries are designed with multiple protections to help make them as forgiving as possible in real-world use. These include shutdown and current-interruption behaviors intended to prevent unsafe conditions from escalating. 

But those protections are not a substitute for correct cable sizing, secure external connections, proper programming, and following the installation guidelines for the full system. It is critical to understand that product testing and safety are designed around nominal use and nominal failures, and cannot protect against negligent or improper operation.   

A Decade+ of Building Safe Batteries for Real-World Use

Battery safety is not the result of any one feature, one test, or one certification. It is the result of layers working together.

For more than a decade, Battle Born has been building batteries for people who rely on this power in real life. Since our first battery sale in 2016, we have sold hundreds of thousands of lithium battery packs, giving us a large body of real-world field experience across RV, marine, off-grid, trucking, and commercial applications. That matters because safety is not just about passing a lab test. It is about helping our customers power real systems with confidence.

That is why we have invested for years in researching, developing, testing, and building batteries for the way people actually use them.

In the end, battery safety is not just about what a product can do on paper. It is about giving our customers confidence that their power system was designed, tested, and built with real-world use in mind.

Safety & Testing FAQs

Q: Are LiFePO4 batteries safe?

A: Yes, when properly installed, LiFePO4 is one of the safest lithium battery chemistries available. It is known for strong thermal stability, but safe system design and installation still matter.

Q: What protections does the Battle Born BMS include?

A: The BMS helps protect against overcharge, over-discharge, overcurrent, short circuit, and temperature extremes. For more details, see the companion BMS article.

Q: What does IP65 mean on a lithium battery?

A: IP65 means the enclosure is dust-tight and protected against low-pressure water jets. It does not mean waterproof or submersible.

Q: What do UL 2054, UL 62133-2, and UN 38.3 mean?

A: UL 2054 covers finished battery pack safety, UL 62133-2 covers lithium cell and pack safety, and UN 38.3 covers transportation safety for shipping lithium batteries.

Q: How are Battle Born batteries tested before shipping?

A: Cells are tested and matched, assembly quality is checked, and the finished battery goes through end-of-line checks such as pack voltage, load behavior, and BMS function.

Q: How do I safely install a lithium battery?

A: Follow the manufacturer’s manual, use proper cable sizing and fusing, make secure terminal connections, and use correct charger and inverter settings. If you are unsure, call support or hire a qualified installer.

Q: Where can I find model-specific certifications and manuals?

A: Check the individual product page for your battery and the Product Resources and Documentation page for manuals and supporting documents.