Safety Facts & Technical Resources

The Facts: Our batteries are built with safety layered into every pack: LiFePO4 chemistry (the most thermally stable lithium chemistry available), cylindrical cells with individual burst caps, a purpose-built battery management system, and a flame-retardant enclosure. The battery’s safety design does not rely on any single component or protection feature alone.

One additional feature exists in certain models in our 50Ah-100Ah range: a passive thermal interrupt in the positive terminal. This is a last-resort backstop, included specifically to meet UL 2054 certification requirements for commercial RV installations through the RVIA (Recreational Vehicle Industry Association). To earn that listing, batteries must survive a worst-case short circuit test with no electronic protection of any kind. Every one of our samples passed.

If a serious external fault creates sustained heat at the terminal, this feature can activate. If it does, your battery will stop working. 

For the full engineering detail, see our Technical Note.

The Facts: The “arcing” was produced under conditions that do not reflect a sealed, properly installed battery operating within published specifications, and that physically prevented the safety mechanism from functioning as designed.

The battery lid was removed, eliminating a structural component the interrupt mechanism depends on. The battery was then charged at approximately double its published maximum current. And rather than observing the battery's natural behavior, the connection was physically remade by moving the alligator clamps to repeatedly re-trigger arcing on camera. In a sealed, correctly installed battery none of these conditions exist.

In our view, what the videos show is not a battery failing in ordinary use. It is a disassembled battery operated far outside its published specifications, with its connections manually manipulated to repeatedly produce an arc on camera for more dramatic results.

See our Technical Note for the full explanation of why lid removal invalidates this testing.

The Facts: There is an important difference between a product that claims to meet a standard and one that has been independently certified to it. Our batteries carry listings from Nationally Recognized Testing Laboratories (NRTLs), including certifications to standards such as UL 2054 and IEC 62133. These are not self-reported certifications. They are earned through rigorous independent third-party testing and actively maintained.

Maintaining these listings is not automatic. A single component change anywhere in the product requires re-testing and re-listing before it can ship. Certified facilities (like ours) are also subject to biannual inspections to verify ongoing compliance.

Characterizations that minimize these certifications do not reflect how independent NRTL certification is earned or maintained.

The Facts: The design of our 100Ah battery, including its thermal protection feature, has been unchanged since the product launched in 2015. The product shipping today uses the same validated design.

That design has now been in the field for over a decade, across hundreds of thousands of batteries, with a track record of positive customer experiences that speaks for itself.

Certification requirements reinforce this. As noted above, a single component change requires re-testing and re-listing before a product can ship.

The Facts: The testing shown in these videos does not reflect normal operating conditions within product specifications. Based on the video content and statements made during testing, we believe the demonstrations appear designed to push the product into extreme failure conditions rather than evaluate ordinary consumer use.

"Continuous current" in a datasheet defines the maximum sustainable current under normal operating conditions. It does not mean a battery can be cycled repeatedly at maximum rate with no rest or thermal recovery between cycles.

The Facts: Will Prowse was a paid commercial partner of Battle Born Batteries for six years. Payments to his company, Prowse Publications LLC, are documented through W-9 and 1099 tax filings, invoices, payment records, and email communications, totaling over $200,000 in affiliate commissions and advertising payments.

In April 2026, on camera, he publicly denied this financial relationship, stating the only thing he ever received from Battle Born was four free batteries.

His affiliate account with Battle Born was deactivated in October 2025. The first video in this series appeared six weeks later. The videos at issue direct viewers to a competitor storefront where he earns affiliate commissions on competing products.

The Facts: Dragonfly Energy disputes this characterization. Battle Born Batteries have been deployed across hundreds of thousands of real-world applications over more than a decade. Claims of systemic failure should be evaluated against complete field performance, warranty, support, and certification records, not isolated examples presented without full context.

The Facts: We take warranty support seriously and review each claim based on the product, application, installation, and available information. The vast majority of claims we receive are approved.

One of the bigger customer frustrations is return shipping. Lithium batteries are classified as hazmat, and carrier rules and shipping costs have become more challenging in recent years. We recognize that this can create frustration, and we are actively working to improve that experience.

Warranties cover manufacturing defects under normal use and installation. Like any electrical product, external installation issues, use outside published specifications, physical damage, or modification may affect coverage.

If you have a concern about your warranty case, please reach out to us directly. We are here to help.