OSHA Lithium-Ion Battery Safety: Rules, Hazards, and Penalties

OSHA does not have a single regulation dedicated to lithium-ion batteries. It enforces workplace safety for them through Section 5(a)(1) of the OSH Act (the General Duty Clause) combined with a handful of existing general industry standards covering hazard communication, personal protective equipment, electrical safety, fire extinguishers, and emergency action plans. That framework is what governs OSHA lithium-ion battery safety requirements, and violations carry current maximum penalties of $16,550 per serious violation and $165,514 per willful or repeated violation.¹

Why the General Duty Clause Does the Heavy Lifting

Section 5(a)(1) of the Occupational Safety and Health Act requires every employer to provide a workplace “free from recognized hazards that are causing or are likely to cause death or serious physical harm.”² Thermal runaway, battery fires, and toxic off-gassing are well-documented dangers, which puts lithium-ion batteries squarely inside the clause’s reach.

OSHA’s own guidance confirms that although no battery-specific standard exists, “many of the OSHA general industry standards may apply, as well as the General Duty Clause.”³ In practice, that means an inspector does not need a dedicated rule to write a citation. If workers handle or work around these batteries and the employer has not taken reasonable steps to control the risks, the General Duty Clause is enough on its own.

Hazard Communication and Safety Data Sheets

The Hazard Communication Standard at 29 CFR 1910.1200 requires employers to identify and communicate the chemical and physical hazards of the materials workers encounter, with manufacturers and importers responsible for classifying hazards and providing Safety Data Sheets.⁴ Whether a lithium-ion battery pulls you into this standard turns on the “article” exemption.

A battery qualifies as an article, and is exempt, only if it is formed to a specific shape during manufacture, its function depends on that shape, and under normal use it does not release more than trace amounts of a hazardous chemical or otherwise pose a physical or health hazard.⁴ An intact battery inside a cordless tool typically meets all three tests.

The exemption falls apart in common workplace conditions. OSHA has clarified that the analysis must account for foreseeable emergencies, not just normal use. When workers routinely handle damaged, defective, or recalled batteries, or when they open non-user-serviceable packs for maintenance or recycling, the article status is gone. In those situations the employer must keep an SDS available and train employees on the hazards. Manufacturers shipping defective batteries for disposal or recycling must also provide an SDS to downstream employers.⁵

When the standard does apply, Safety Data Sheets must be readily accessible during every work shift, and training must cover safe handling, storage, and fire-fighting measures. Retraining is required not only at initial assignment but whenever a new chemical hazard the employee has not been trained on enters the work area.⁴ Bringing in a different battery chemistry or a new large-format pack triggers that requirement even if workers completed initial hazcom training years ago. Labeling requirements travel with the SDS obligation, and damaged or recalled units deserve close attention because a battery that shipped safely in its original packaging may now present an immediate fire or chemical exposure risk.

Personal Protective Equipment

OSHA’s PPE standard at 29 CFR 1910.132 requires employers to assess the workplace for hazards and provide protective equipment matched to what the assessment shows.⁶ For lithium-ion batteries the assessment should address two distinct scenarios: routine handling of intact batteries, and response to a leaking, swelling, or damaged unit.

Standard work gloves and safety glasses are usually enough for the first scenario. The second is different. The electrolyte in most lithium-ion cells contains organic solvents and lithium salts that can burn skin and seriously injure eyes. Chemical-resistant gloves (nitrile or neoprene rated for the specific electrolyte), splash-proof goggles, and protective clothing should be available, and OSHA’s lithium-ion guidance recommends providing safety showers and eyewash stations where electrolyte exposure is possible.³ The employer must communicate PPE selection decisions to each affected employee and ensure the equipment fits properly.⁶ Where a battery event could release hydrogen fluoride or other toxic gases, respiratory protection also has to be part of the plan.

Charging and Electrical Safety

Charging is when lithium-ion batteries are most vulnerable to failure. OSHA’s general industry electrical rules and manufacturer-specific requirements both apply.

Certified Equipment and Matched Chargers

Chargers must match the specific battery chemistry and voltage. Mixing chargers and packs from different manufacturers, or using a charger rated for a different cell chemistry, defeats the safety controls built into both. Charging equipment should be tested and certified by a Nationally Recognized Testing Laboratory.⁷ Look for a UL, CSA, Intertek, or other OSHA-recognized NRTL mark on both charger and pack. Modern chargers with automatic shutoff should be standard, and no battery or charger should be modified in a way the manufacturer has not approved, since modifications defeat overcharge protection, thermal cutoffs, and cell-balancing circuits.

Charging Areas and Qualified Persons

Charging areas need adequate ventilation to dissipate heat and any gases that vent from a cell during charging. Keep stations away from combustible materials and exit routes, and maintain the wiring and electrical installations that serve them, since electrical faults are a common ignition source.

Workers who maintain battery systems or work near exposed energized components need to be designated as “qualified persons” under 29 CFR 1910.332. At minimum they must be trained to distinguish live parts from other equipment, determine nominal voltage, and know safe clearance distances for the voltages involved.⁸ This matters most in facilities running large-format battery systems where voltages can reach hundreds of volts.

Lithium-Ion Forklifts

Facilities using lithium-ion powered industrial trucks must also meet 29 CFR 1910.178. Battery charging installations must be in designated areas with fire protection, adequate ventilation, and facilities for protecting charging equipment from truck damage.⁹ Some employers assume sealed lithium-ion packs put them outside 1910.178(g). They don’t. The standard governs the charging installation, not just the battery chemistry.

Storage and Handling

Most lithium-ion battery fires trace back to physical damage, and most physical damage is preventable with straightforward controls: keep batteries from being crushed, punctured, dropped, or exposed to conditions that degrade them.

Store batteries in cool, dry locations within the manufacturer’s specified temperature range. Heat accelerates degradation and lowers the threshold for thermal runaway.
Use dedicated shelving, bins, or containers that shield batteries from impact. Loose batteries do not belong where forklifts operate or where heavy objects move.
Protect terminals from contact with conductive materials. Tape terminals, keep batteries in original packaging, or store them in individual compartments.
For extended storage, manufacturers commonly recommend a partial charge state (often around 40–60 percent) rather than full charge, which reduces stress on cells and limits the energy available if something goes wrong.

A compromised battery is a different problem from an intact one. Remove it from service immediately and place it in a fire-resistant isolation container, such as a metal drum or a commercially available battery containment vessel, with non-combustible packing material to slow fire spread. Store those containers away from other batteries, combustible materials, and occupied areas. Damaged batteries end up on the same shelf as good ones in too many workplaces, or in a cardboard box near the charging station, waiting for someone to deal with them. That is where the General Duty Clause exposure starts.

Fire Prevention and Emergency Response

Lithium-ion battery fires do not behave like ordinary combustible or electrical fires, and both prevention and emergency planning have to reflect that.

Why These Fires Are Different

A cell in thermal runaway generates its own oxygen through internal chemical decomposition, so smothering with a Class B or C agent may not stop the reaction. The fire burns intensely and can reignite hours after it appears extinguished if the cells have not fully cooled. The gases released are equally dangerous: hydrogen fluoride, carbon monoxide, phosphoryl fluoride, and other toxic byproducts. Hydrogen fluoride alone has an immediately-dangerous-to-life-or-health concentration of just 30 parts per million, a level a burning battery pack can exceed rapidly in an enclosed space.

Portable Fire Extinguishers

OSHA requires portable fire extinguishers selected and distributed based on the classes of fire anticipated in the workplace. Extinguishers must be mounted in accessible locations, maintained in operable condition, and positioned so employees do not have to travel more than 75 feet to reach one for Class A hazards or 50 feet for Class B hazards.¹⁰ Standard ABC dry-chemical units can knock down flames but do not stop thermal runaway inside the cells. Large quantities of water are often the most effective cooling agent for preventing cell-to-cell propagation in a multi-cell pack, though water introduces its own electrical and runoff issues. Your fire prevention plan should document what agents you have selected for battery areas and why.

Emergency Action Plans

Where an OSHA standard requires an emergency action plan, the plan must be written, kept in the workplace, and available for employee review. At minimum it must cover procedures for reporting fires and other emergencies, evacuation routes and assignments, procedures for employees who stay behind to operate critical equipment, a method for accounting for all employees after evacuation, and the contact for the person who can answer questions about the plan.¹¹

A workplace with significant lithium-ion inventory needs more than a generic plan. Address the toxic gas hazard explicitly, so employees know that a battery fire in an enclosed area means evacuate, not grab an extinguisher. Include shutdown procedures for charging stations and energy storage systems. If the facility operates large-format installations, coordinate with the local fire department before an incident, because most municipal departments have limited experience with these fires.

Consensus Standards as a Benchmark

NFPA 855, the Standard for the Installation of Stationary Energy Storage Systems, provides installation guidance that OSHA can reference when evaluating whether an employer has met its General Duty Clause obligation. NFPA standards are not OSHA regulations, but they represent recognized best practices, and falling short of them gives OSHA a ready-made benchmark for a citation.

Shipping and Disposal Obligations That Intersect With OSHA

Workplace safety obligations do not stop at the loading dock. If your facility ships or disposes of these batteries, federal transportation and environmental rules run alongside OSHA’s requirements, and the same mishandled package can produce both a DOT violation and an OSHA hazcom failure.

The Department of Transportation’s Hazardous Materials Regulations at 49 CFR Parts 171–180 classify lithium-ion batteries as hazardous materials. Fully regulated batteries shipped under UN3480 require UN-specification packaging meeting Packing Group II performance standards, with terminals protected against short circuits and cells separated from conductive materials. Smaller batteries meeting certain watt-hour thresholds qualify for streamlined packaging exceptions but still need a lithium battery mark and terminal protection. As of May 2024, all lithium-ion batteries must have the watt-hour rating marked on the outer case regardless of size.¹² Employees who prepare shipments need training on those requirements.

On disposal, EPA recommends managing discarded lithium-ion batteries under the federal universal waste rules in 40 CFR Part 273, which are simpler than full hazardous waste requirements. Rules differ based on whether the facility accumulates less or more than 5,000 kilograms of universal waste on site at one time, and both tiers include labeling, accumulation time limits, and destination requirements. Universal waste shipments do not need a hazardous waste manifest but must go to a permitted disposal facility or recycler.¹³ Putting spent lithium-ion batteries in regular trash is both an environmental violation and a fire hazard that compounds OSHA exposure.

Penalties for Noncompliance

OSHA penalties are adjusted annually for inflation. As of the January 2025 adjustment, the maximum fine for a serious or other-than-serious violation is $16,550 per violation. Willful or repeated violations carry a maximum penalty of $165,514 per violation.¹

Those figures are ceilings per individual violation, and violations stack. An employer with an inadequate hazard communication program, no emergency action plan, missing fire extinguishers, and no PPE hazard assessment can face separate citations for each deficiency. A workplace fire or serious injury almost always triggers an inspection, and if OSHA finds the employer knew about the hazards and failed to act, the willful classification and its tenfold higher penalty come into play.

1
Occupational Safety and Health Administration. 2025 Annual Adjustments to OSHA Civil Penalties
2
Occupational Safety and Health Administration. OSH Act of 1970 – Section 5 Duties
3
OSHA. Lithium-ion Battery Safety
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eCFR. 29 CFR 1910.1200 – Hazard Communication
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Occupational Safety and Health Administration. Applicability of the HCS to Lithium Ion Batteries
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Occupational Safety and Health Administration. 1910.132 – General Requirements
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Federal Register. Federal Register Vol. 88 No. 182 – NRTL Scope of Recognition
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Occupational Safety and Health Administration. 1910.332 – Training
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Occupational Safety and Health Administration. 1910.178 – Powered Industrial Trucks
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Occupational Safety and Health Administration. 1910.157 – Portable Fire Extinguishers
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Occupational Safety and Health Administration. 1910.38 – Emergency Action Plans
12
PHMSA. Lithium Battery Guide for Shippers
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US EPA. Used Lithium-Ion Batteries