U.S. Lithium Battery Regulations & Codes — How They Fit Together
Lithium battery safety in the United States is governed by several overlapping systems rather than one universal rule. This guide explains which authorities, codes, standards and transport regulations may become relevant — and where each one fits.
There is no single U.S. lithium battery safety rule.
A business looking for a simple answer such as “What cabinet does the law require?” can quickly encounter OSHA, DOT, PHMSA, the International Fire Code, NFPA standards, UL standards, state or local amendments and the Authority Having Jurisdiction.
These documents do not all perform the same function, and they do not all apply to every battery activity. The first task is therefore to establish what the batteries are doing, where they are located and which authority has jurisdiction over that activity.
Storage, charging, stationary energy storage, workplace use and transportation can bring different requirements into scope. A product being described as “compliant” does not by itself establish that it satisfies every requirement at a particular site.
Code editions and amendments vary by jurisdiction. The applicable Authority Having Jurisdiction, fire code official, employer, competent professional or transport specialist may need to confirm requirements for a particular site or shipment.
Think of the requirements as layers rather than one hierarchy.
A single battery operation can sit inside several different systems. An employer may have workplace-safety responsibilities while the building is subject to an adopted fire code and batteries leaving the site become subject to federal hazardous-material transportation requirements.
Testing and product standards can then provide evidence about the equipment being used, while the local authority may determine whether a proposed arrangement is acceptable for that particular facility.
Worker hazards, employer responsibilities, hazard communication and other applicable workplace-safety requirements.
Hazardous Materials Regulations governing lithium batteries offered for transportation in commerce.
The International Fire Code, NFPA-based codes or other local requirements may be adopted and amended by the jurisdiction.
Standards can define installation, testing, certification or performance criteria and may be referenced by adopted codes.
The Authority Having Jurisdiction can be central to approval, interpretation and enforcement for a particular installation.
For example, a commercial battery operation may need to consider employee exposure, adopted fire-code requirements, equipment documentation and the transport rules that apply when a damaged battery is shipped off site.
The same battery can enter a different regulatory pathway when its use changes.
A battery being used in equipment, stored as inventory, connected as part of a stationary energy-storage system, isolated because it is damaged or prepared for transportation may need to be considered differently.
Workplace safety, product suitability, manufacturer instructions and site fire-safety controls may be relevant.
Consider electrical load, charger compatibility, location, supervision, fire protection and applicable site requirements.
Quantity, condition, packaging, state of charge, building location and adopted fire-code provisions can become important.
ESS installations have a more developed code and standards framework including IFC, NFPA and UL requirements.
Normal operational controls may no longer be sufficient and separate isolation, assessment and disposition processes may be needed.
Once lithium batteries are offered for transport, DOT / PHMSA hazardous-material requirements can become relevant.
Model codes matter — but the adopted local code is the important one.
The International Fire Code is widely used as a model code in the United States, but a model code is not automatically the law in every jurisdiction. States and local authorities can adopt particular editions and make amendments.
This means two similar facilities in different locations can encounter different adopted editions, permit processes or interpretations.
The 2024 IFC includes a dedicated section for the storage of lithium-ion and lithium-metal batteries. It contains provisions addressing subjects such as permits, fire-safety planning, limited indoor storage, larger indoor storage areas, fire protection, detection and outdoor storage.
View ICC source ↗First establish the code edition adopted by the state or local jurisdiction, any amendments, the occupancy and the way the batteries are being stored or used.
OSHA is relevant — but “OSHA compliant cabinet” is too simplistic.
OSHA addresses workplace safety and has published lithium-ion battery safety information covering hazards including thermal runaway, fire, explosion and chemical exposure.
OSHA's requirements can also intersect with areas such as hazard communication, worker training, electrical safety and emergency planning depending on the work activity and exposure.
Consider normal operation as well as foreseeable abnormal conditions such as damaged batteries, repair, recycling, leakage, venting or fire.
A seller should be able to identify the actual OSHA requirement supporting a compliance claim rather than using “OSHA compliant” as a general marketing label.
OSHA's current lithium-ion battery fact sheet addresses battery hazards and controls for facilities that manufacture, use, install or recycle lithium-ion batteries.
View OSHA fact sheet ↗OSHA has published interpretations explaining how the Hazard Communication Standard can apply to lithium-ion batteries depending on their classification and whether an exemption applies.
View OSHA interpretation ↗When the battery leaves the site, a different rule set can take over.
Lithium batteries are regulated as hazardous materials in transportation. PHMSA directs shippers to the U.S. Hazardous Materials Regulations, including 49 CFR §173.185, for requirements applying to lithium battery shipments.
Battery chemistry, configuration, rating, condition, packaging, transport mode and destination can all affect what is required.
Classification, testing, packaging, marks, labels, documents and other requirements may apply depending on the shipment.
Requirements can differ from batteries shipped by themselves.
Batteries being sent for recycling remain subject to applicable transportation requirements.
These batteries can require additional controls and must not be treated as an ordinary shipment merely because they have been placed inside a storage container.
Before a damaged battery leaves a site, establish its transport classification and the applicable packaging and mode requirements.
PHMSA provides shipper guidance, information on damaged, defective or recalled batteries and links to the applicable Hazardous Materials Regulations.
View PHMSA guidance ↗NFPA, UL listings and UL test methods are related — but not interchangeable.
NFPA 855 is the Standard for the Installation of Stationary Energy Storage Systems. The 2026 edition also contains a chapter covering storage of lithium-metal or lithium-ion batteries.
NFPA source ↗UL 9540 addresses Energy Storage Systems and Equipment and evaluates the assembled system, including interactions between relevant components and protection functions.
UL source ↗UL 9540A is a test method used to evaluate thermal-runaway fire propagation behaviour in battery energy-storage systems. It should not be described simply as a generic certification for every lithium battery product.
UL source ↗Ask what exactly has been tested, listed or certified.
Ask for the actual standard number and edition.
Confirm whether the claim applies to the complete product, a component or a test specimen.
Understand the configuration and scale at which the testing was performed.
Identify the testing, certification or listing organisation.
Review battery type, energy, spacing, installation and other conditions.
Technical evidence still needs to fit the requirements of the proposed installation.
Good procurement starts by obtaining the actual evidence and understanding what the evidence demonstrates — and what it does not.
A better way to approach a lithium battery compliance question.
Chemistry, battery type, quantity, Wh / kWh, physical format and condition.
Storage, charging, use, stationary energy storage, isolation, recycling or transportation.
State, city, occupancy, building location, fire protection, supervision and neighbouring exposures.
Determine the adopted fire/building code and the relevant AHJ.
Consider workplace obligations and transportation requirements where relevant.
Determine what the site actually needs from storage, charging, detection, containment, isolation or transport systems.
Review testing, certification, documentation and limitations against the requirement.
Where required, resolve questions with the AHJ, EHS team, insurer, fire authority or other responsible stakeholder.
Reversing that process — selecting a product first and then searching for a compliance claim to justify it — is a weaker approach.
Start with the authority, not a reseller's interpretation.
Regulations, codes and standards change. Confirm current editions, local adoption and applicability before relying on any requirement.
Start with the batteries, activity and site.
Battery Safe Systems can help organise the operational requirement and compare appropriate storage, charging, isolation, transport or emergency-preparedness solutions.