Shipping lithium batteries under DOT hazmat rules means classifying them as Class 9 hazardous materials under 49 CFR § 173.185, selecting the correct PHMSA shipping guide for your specific scenario, and meeting every packaging, marking, labeling, documentation, and training requirement before you hand the shipment to a carrier. That is the non-negotiable starting point for DOT hazmat battery shipping compliance in the U.S.
Before you tender anything, confirm three things: the battery chemistry (lithium-ion or lithium-metal), the size measurement (watt-hours for Li-ion, grams of lithium content for Li-metal), and the configuration (contained in equipment, packed with equipment, or shipped separately as a spare). Those three answers determine which PHMSA guide applies and which rules govern your shipment.
The risk of skipping this step is concrete. Carriers can and do refuse non-compliant shipments at the dock. DOT civil penalties follow. If you cannot verify classification and packaging with certainty, stop the shipment and engage a certified hazmat shipper before proceeding.
- Confirm chemistry: lithium-ion (rechargeable) vs. lithium-metal (primary/non-rechargeable)
- Measure size: Wh rating for Li-ion cells and batteries; grams of lithium content for Li-metal
- Identify configuration: contained in equipment / packed with equipment / packed separately
- Select the correct PHMSA guide using the PHMSA Lithium Battery Guide for Shippers before tendering
- Verify UN 38.3 test evidence is on file; without it, the shipment cannot legally be offered for transport
Key Takeaways
Compliant DOT hazmat battery shipping requires correct classification under 49 CFR, the right PHMSA guide for your scenario, and complete packaging, marking, documentation, and training before any carrier accepts the shipment.
| Point | Details |
|---|---|
| Classify before you pack | Confirm chemistry, Wh or grams, and configuration to select the correct UN number and PHMSA guide. |
| Wh marking is now required | As of May 10, 2024, lithium-ion batteries must be marked with their Wh rating when the applicable guide requires it. |
| Air transport is the strictest mode | Lithium-ion cells and batteries as cargo are prohibited on passenger aircraft; cargo-only aircraft shipments require SOC compliance and CAO marking. |
| SDS is not a shipping document | DOT states the shipper is legally responsible for classification; an SDS may contain incorrect transport information and cannot substitute for proper shipping papers. |
| Usedcartridge handles it end-to-end | Usedcartridge provides collection, UN-spec packaging, hazmat paperwork, and audit-ready documentation for compliant battery disposal and recycling. |
Table of Contents
- How do you pick the correct PHMSA shipping guide for your shipment?
- What are the classification essentials for lithium batteries?
- What packaging, marking, and labeling do you need before tendering?
- How do mode-specific rules change what you can ship?
- What quantity limits and exceptions apply to your shipment?
- What must appear on your shipping papers?
- Who is responsible for training, and what are the penalties for non-compliance?
- How do you handle damaged, defective, or recalled lithium batteries?
- How do you choose a compliant recycler or transport partner for battery disposal?
- Why compliance pays off in ways that go beyond avoiding fines
- Compliant battery collection and shipping, handled for your business
- Sources
How do you pick the correct PHMSA shipping guide for your shipment?
PHMSA publishes scenario-based shipping guides (Guides 01–10) that map battery chemistry, configuration, and size to the applicable Hazardous Materials Regulations (HMR). The fastest path to the right guide is a three-checkpoint decision flow.
Step 1: Determine product state. Is the battery installed inside a device (contained in equipment), placed in the same box as a device but not installed (packed with equipment), or shipped on its own as a spare? Each configuration has its own UN entry in the Hazardous Materials Table at § 172.101.
Step 2: Identify chemistry and measure size. Lithium-ion batteries are measured in watt-hours (Wh); lithium-metal batteries are measured in grams of lithium content. Both figures appear on the battery label or in the manufacturer’s specification sheet. If neither is visible, contact the manufacturer before shipping.
Step 3: Run three yes/no checkpoints.
| Checkpoint | Yes | No |
|---|---|---|
| Is the battery damaged, defective, or under recall? | Stop — apply damaged/defective rules (highway/rail/vessel only in most cases) | Continue to next check |
| Is the shipment going by passenger aircraft? | Lithium-ion cells/batteries as cargo are prohibited on passenger aircraft | Continue to next check |
| Does the shipment meet “smaller battery” quantity limits? | Use the applicable limited exception provisions | Full packaging and UN performance packaging required |
If any checkpoint triggers a “stop,” the corresponding PHMSA guide for that scenario applies. Mismatching a guide to the wrong scenario is one of the most common audit findings regulators cite.
Pro Tip: Keep the manufacturer’s UN 38.3 test summary and the battery’s Wh or lithium-content documentation with the package paperwork on every shipment. Auditors and carriers ask for it, and not having it on hand is treated the same as not having it at all.
The Hazardous Materials Table in § 172.101 lists the proper shipping name, UN number, hazard class, packing group, and special provisions for each entry. Cross-reference the table with the PHMSA guide to confirm you have the right combination before building the package.
What are the classification essentials for lithium batteries?
Chemistry and UN numbers
Two chemistries, two sets of rules. Lithium-ion batteries are rechargeable and use an intercalated lithium compound as the electrode material. Lithium-metal batteries are primary (non-rechargeable) and contain elemental lithium. The distinction matters because the UN numbers, size thresholds, and mode restrictions differ between them.
Common UN entries in the Hazardous Materials Table:
| Chemistry | Configuration | UN Number | Proper Shipping Name |
|---|---|---|---|
| Lithium-ion | Packed separately | UN3480 | Lithium ion batteries |
| Lithium-ion | Contained in/packed with equipment | UN 3481 | Lithium ion batteries contained in/packed with equipment |
| Lithium-metal | Packed separately | UN 3090 | Lithium metal batteries |
| Lithium-metal | Contained in/packed with equipment | UN 3091 | Lithium metal batteries contained in/packed with equipment |
All four entries are Class 9 (miscellaneous hazardous materials). There is no packing group assigned to lithium batteries under the HMR.
How size is measured
For lithium-ion cells and batteries, size is expressed in watt-hours (Wh). A cell’s Wh rating equals voltage multiplied by ampere-hour capacity. For lithium-metal cells and batteries, size is expressed as lithium content in grams, representing the mass of elemental lithium in the anode.
As of May 10, 2024, lithium-ion batteries must be marked with their Wh rating when the applicable PHMSA guide requires it. This requirement, documented in the PHMSA Lithium Battery Guide, closes a longstanding gap where shippers could not verify size without contacting the manufacturer.
Configuration definitions
- Contained in equipment: the battery is installed and powers the device; the device is what is being shipped
- Packed with equipment: the battery is in the same outer packaging as the device but not installed in it
- Packed separately (spare): the battery is shipped on its own, not with any device
These three configurations determine which UN entry applies and, in turn, which packaging, marking, and quantity rules govern the shipment.
What packaging, marking, and labeling do you need before tendering?
Packaging requirements
Inner packagings must fully enclose each cell or battery and prevent contact with conductive materials. Batteries must be separated from each other and from metal objects that could cause a short circuit. When UN performance (UN specification) outer packaging is required, the packaging must bear the UN mark and meet the performance standards tested under the HMR.
49 CFR § 173.185 requires that completed packages pass a 1.2-meter drop test. In practical terms, the package must survive being dropped from roughly four feet onto a hard surface without the batteries shifting, short-circuiting, or breaching the outer packaging. This is not a theoretical standard; carriers and regulators treat it as a minimum floor, and packages that fail on arrival can trigger enforcement.
Short-circuit protection
Every terminal must be protected against short-circuit. Acceptable methods include:
- Insulation tape applied over exposed terminals
- Individual plastic bags or nonconductive caps on each battery
- Placing batteries in original retail packaging that separates terminals from conductive surfaces
- Removing batteries from equipment when the equipment itself could activate and generate heat
Markings and labels
- Lithium battery mark: required on the outer packaging for most lithium battery shipments; the mark must meet the format and minimum size requirements in the HMR (at least 120 mm × 110 mm for standard packages, with a reduced size allowed for small packages that cannot accommodate the full mark)
- Proper shipping name and UN number: must appear on the outer packaging
- Class 9 label: required on packages subject to full HMR requirements
- “CARGO AIRCRAFT ONLY” (CAO) marking: required when the shipment is authorized only for cargo aircraft; the CAO label replaces the standard Class 9 label in those cases
Overpacks and small-package exceptions
When multiple packages are consolidated into an overpack, the overpack must be marked “OVERPACK” and must display the same markings and labels as the individual packages inside, unless those markings and labels are visible through the overpack material. Smaller-battery exceptions reduce some marking and packaging requirements, but they do not eliminate the lithium battery mark requirement entirely. Confirm which exception applies before removing any label.
Operational checklist for packing teams:
- Confirm UN 38.3 test evidence is on file before starting
- Select inner packaging that fully encloses each battery
- Apply short-circuit protection to every terminal
- Place batteries in UN spec outer packaging when required
- Apply lithium battery mark, proper shipping name, UN number, and Class 9 label
- Add CAO marking if shipment is cargo-aircraft-only
- Photograph the completed package before sealing for audit evidence
- Retain photos and packing records with the shipping papers
How do mode-specific rules change what you can ship?
Air transport
Air is the strictest mode, and the rules tightened further with the PHMSA final rule effective January 20, 2023. Under that rule, lithium-ion cells and batteries as cargo are prohibited on passenger aircraft. Lithium-metal batteries have been prohibited on passenger aircraft for longer. Cargo-only aircraft shipments are permitted under specific conditions, including a state-of-charge (SOC) limit for lithium-ion batteries shipped as cargo.
ICAO’s Technical Instructions and IATA’s Dangerous Goods Regulations govern international air shipments and align with PHMSA’s domestic rules, though IATA often imposes stricter limits than the regulatory minimum. The FAA enforces these rules on U.S.-registered carriers. Air carriers routinely publish supplemental limitations beyond ICAO/IATA minimums, so carrier pre-acceptance confirmation is not optional — it is a required step before tendering any battery shipment by air.
Highway, rail, and vessel
The HMR applies to highway and rail transport. Most packaging exceptions available under § 173.185 are mode-agnostic for ground transport, meaning the same inner packaging and marking rules apply whether the shipment moves by truck or rail. Motor vehicle transport has one notable allowance: batteries destined for disposal or recycling at a permitted facility may move under specific provisions that relax some packaging requirements, provided the shipment meets the conditions in § 173.185 and the shipping papers carry the required notation.
Vessel shipments follow the International Maritime Dangerous Goods (IMDG) Code for international movements and the HMR for domestic waterway transport.
U.S. mail
USPS allows certain lithium battery shipments domestically under USPS Packaging Instruction 9D, which specifies when lithium-metal and lithium-ion cells and batteries are mailable and the packaging conditions for both air and surface mail. Not all battery configurations are mailable. Batteries shipped separately as spares face tighter restrictions than batteries installed in devices. Check Packaging Instruction 9D before assuming a battery shipment is mailable.
| Mode | Governing Standard | Key Restriction |
|---|---|---|
| Passenger aircraft | PHMSA/FAA/ICAO/IATA | Li-ion cells/batteries as cargo prohibited |
| Cargo aircraft only | PHMSA/FAA/ICAO/IATA | SOC limit applies; CAO marking required |
| Highway/rail | HMR (49 CFR) | Standard HMR packaging and marking rules |
| Vessel (international) | IMDG Code + HMR | IMDG class/packing group requirements |
| U.S. mail | USPS Packaging Instruction 9D | Configuration-specific mailability rules |
Carrier acceptance: Many carriers, including UPS, publish hazardous materials acceptance guides that go beyond the HMR minimums. Always obtain written carrier pre-acceptance confirmation for lithium battery consignments before tendering, regardless of mode.
What quantity limits and exceptions apply to your shipment?
Smaller-battery exceptions
The HMR provides reduced-requirement exceptions for batteries that fall below specific size thresholds. For lithium-ion cells, the threshold is 20 Wh per cell and 100 Wh per battery. For lithium-metal cells, the threshold is 1 gram of lithium content per cell and 2 grams per battery. Shipments that stay within these limits and meet the applicable quantity restrictions can use the smaller-battery exception provisions, which reduce packaging and marking requirements compared to full regulated handling.
Exceeding either threshold by even a fraction moves the shipment into full regulated territory. There is no rounding down.
One-package-per-consignment limits
When shipping under certain exception provisions, the HMR limits the number of packages per consignment. Consolidating multiple small-battery packages into a single consignment to stay under the limit is a common compliance error. Each consignment must be evaluated independently.
Medical device exception
Replacement batteries for implantable medical devices and other medical equipment may qualify for a limited exception under specific conditions. The shipper must document the medical device application and, in some cases, obtain prior approval. This exception is narrow; it does not apply to consumer medical devices like hearing aids in most standard shipping scenarios.
Numeric examples:
- A laptop battery rated at 72 Wh exceeds the 100 Wh-per-battery threshold for the smaller-battery exception. Full packaging, marking, and labeling under § 173.185 apply.
- A smartphone battery rated at 11.4 Wh falls below the 20 Wh-per-cell threshold. The smaller-battery exception may apply, subject to quantity limits.
- A lithium-metal coin cell containing 0.3 grams of lithium falls below the 1-gram-per-cell threshold. Exception provisions may apply.
Statistic callout: The PHMSA Lithium Battery Guide identifies ten distinct shipping scenarios (Guides 01–10). Each guide maps to a specific combination of chemistry, configuration, and size — meaning the same physical battery can fall under different rules depending solely on how it is packaged and what it is shipped with.
What must appear on your shipping papers?
Shipping papers for lithium battery shipments must include all of the following data elements, per the HMR:
- Proper shipping name (e.g., “Lithium ion batteries”)
- UN identification number (e.g., UN3480)
- Hazard class (Class 9)
- Net quantity (number of cells or batteries, or total weight)
- Type of packaging and number of packages
- Emergency contact telephone number (a 24-hour number staffed by someone with hazmat knowledge, or a CHEMTREC-type service)
- Shipper’s certification statement confirming the shipment is properly classified, packaged, marked, and labeled
Two situations require specific additional notations. Batteries shipped for disposal or recycling must be identified as such on the shipping papers. Damaged, defective, or recalled batteries require a notation that the batteries are damaged, defective, or recalled and are being transported for disposal or recycling, along with the applicable regulatory reference.
An SDS is not a substitute for proper shipping papers. DOT is explicit on this point: the shipper is legally responsible for classification under the HMR, and SDS information may be incorrect for transport purposes. Relying on an SDS for transport classification is a compliance failure, not a defense.
A compliant shipping paper entry looks roughly like this: Lithium ion batteries, 9, UN3480, net quantity: 10 batteries, 5 kg; Emergency contact: [24-hour number]; Shipper’s certification: [required text]. The exact certification language is specified in 49 CFR § 172.204.
Who is responsible for training, and what are the penalties for non-compliance?
Shipper and employer responsibilities
The shipper is legally responsible for correct classification, packaging, marking, labeling, and offering the shipment with accurate paperwork. This responsibility cannot be delegated to a carrier or a third-party logistics provider without a formal agreement that specifies who performs each function. DOT’s guidance is unambiguous: if your name is on the shipping papers as shipper, you own the compliance obligation.
Hazmat training requirements
Every employee who prepares, offers, or handles hazardous materials shipments must receive hazmat training that covers:
- General awareness: recognition of hazmat and the regulatory framework
- Function-specific training: the tasks that employee actually performs (classification, packaging, marking, documentation)
- Safety training: emergency response procedures and personal protective equipment
- Security awareness: recognizing and responding to security threats involving hazmat
- Recurrent training: required at least every three years, with testing to verify competency
Employers must maintain training records for each employee, including the training dates, materials covered, and the name of the trainer or training provider. Records must be retained for as long as the employee performs hazmat functions, plus 90 days after they stop.
Enforcement and penalties
DOT civil penalties for hazmat violations can reach tens of thousands of dollars per violation per day. Common audit findings that trigger enforcement include:
- Misclassification: using the wrong UN number or shipping description
- Missing UN 38.3 evidence: no test summary on file to prove the battery meets the UN Manual of Tests and Criteria
- Inadequate packaging: inner packaging that does not fully enclose batteries, or outer packaging that fails the 1.2-meter drop test standard
- Missing or incorrect markings: lithium battery mark absent, wrong size, or placed on the wrong surface
- Incomplete shipping papers: missing emergency contact number or shipper’s certification
Operational recommendation: Maintain training logs, sample packing photographs, and copies of UN 38.3 test summaries with each shipment’s paperwork. When an auditor arrives, the ability to produce these documents immediately is the difference between a warning and a penalty.
How do you handle damaged, defective, or recalled lithium batteries?
Damaged, defective, or recalled lithium batteries are treated as a separate regulatory category under § 173.185. In most cases, these batteries may only be transported by highway, rail, or vessel. Air transport requires Associate Administrator approval from PHMSA, which is not routinely granted for standard commercial shipments.
Packaging requirements for these batteries are more demanding than for standard lithium battery shipments. Each battery must be individually packaged in a manner that prevents short-circuiting, thermal runaway propagation, and leakage. The outer packaging must be capable of containing any leakage or venting. In practice, this often means using UN-spec packaging with absorbent material and a sealed inner liner.
Immediate steps when a damaged or defective battery is discovered:
- Isolate the battery from other materials and from heat sources
- Document the condition with photographs before moving it
- Notify the carrier and the emergency contact immediately
- Escalate internally to the safety officer or hazmat team before attempting to package or ship
- Do not place a visibly swollen, leaking, or hot battery in any enclosed space
Shipping papers for damaged, defective, or recalled batteries must include a notation identifying the batteries as such and referencing the applicable regulatory provision. The proper shipping name changes: “Lithium ion batteries — damaged/defective” or “Lithium metal batteries — damaged/defective,” with the corresponding UN number. This notation is not optional; it alerts carriers and emergency responders to the elevated risk.
How do you choose a compliant recycler or transport partner for battery disposal?
Selecting the wrong recycler or transport partner for battery disposal exposes your organization to the same DOT penalties as mishandling the shipment yourself. The shipper of record remains liable even when a third party physically handles the batteries.
Provider selection checklist
A compliant recycler or transport partner should be able to demonstrate:
- EPA and state permits for battery storage and processing at their facility
- DOT hazmat registration where required (carriers transporting certain quantities of hazardous materials must register with PHMSA)
- Carrier relationships and hazmat shipping experience with documented carrier pre-acceptance for lithium battery consignments
- Insurance and liability coverage that explicitly covers hazmat incidents during transport and processing
- UN 38.3 test report handling — they should know what it is and be able to confirm they require it from their own suppliers
For businesses managing battery recycling responsibly, the provider’s documentation practices matter as much as their physical handling capabilities.
Questions to ask a prospective recycler
- Do you accept damaged or defective batteries, and what is your packaging protocol for them?
- Do you provide UN spec packaging and obtain carrier pre-acceptance before every shipment?
- Can you provide a chain-of-custody document and a full audit packet for each collection?
- What is your process if a battery shows signs of thermal runaway during collection or transport?
Audit documents to demand before signing a contract
- Signed shipping papers for a sample prior shipment
- Emergency contact information and verification that the number is staffed 24 hours
- Photographs of packaged items from a prior collection
- UN 38.3 test summaries for the battery types they handle
- Final disposition certificates confirming recycling or compliant disposal
Practical procurement tip: Require a site visit or a live demonstration of packing procedures before committing. Retain contractual indemnities for hazmat non-compliance — if the partner causes a violation, your contract should specify who bears the penalty. A partner who resists either request is telling you something about their actual compliance posture.
For a broader view of what electronic disposal regulations require across your organization’s full e-waste stream, that compliance context helps frame what to demand from any recycling partner.
The compliance gap that most procurement teams miss
Most organizations evaluate recyclers on price and pickup convenience. The audit packet is an afterthought. That is exactly backwards. A recycler who cannot produce a chain-of-custody document and a signed shipping paper for a prior shipment within 24 hours of your request is not operating at the compliance level DOT hazmat battery shipping requires. Price is irrelevant if the partner’s paperwork failure becomes your enforcement action.
Why compliance pays off in ways that go beyond avoiding fines
Treating PHMSA compliance as a cost center misses the actual business case. Carriers that trust your paperwork process your shipments faster. Auditors who find clean records close cases faster. Customers who receive audit packets with their battery collections renew contracts at higher rates than those who receive nothing but a pickup receipt.
The shippers who struggle most with DOT hazmat battery shipping are not the ones who lack knowledge — they are the ones who treat compliance as a one-time setup rather than an ongoing operational discipline. The HMR changes. Carrier policies change. The May 10, 2024 Wh marking requirement caught a significant number of shippers off-guard precisely because they had not built a process for monitoring regulatory updates.
Build the compliance check into the shipment workflow, not the exception process. Pre-shipment classification review, packing photographs, and UN 38.3 file maintenance should be standard operating procedure, not something that happens only when a carrier pushes back. The organizations that do this consistently find that carrier acceptance rates improve and that internal audit preparation time drops substantially.
Compliant battery collection and shipping, handled for your business
Businesses that manage their own lithium battery shipments carry the full weight of DOT classification, packaging, documentation, and training requirements. Usedcartridge removes that burden with a complete, audit-ready e-waste logistics service built for organizations that cannot afford a compliance gap.
Usedcartridge handles collection, UN-spec packaging, hazmat shipping paperwork, chain-of-custody documentation, and compliant recycling or disposition for lithium batteries and other e-waste. Every collection comes with the audit packet your compliance team needs: signed shipping papers, emergency contact verification, packing photographs, and final disposition certificates.
What you get with Usedcartridge:
- Audit-ready documentation on every collection, not just on request
- Permitted transport with carrier pre-acceptance confirmed before pickup
- Insurance and liability coverage for hazmat incidents during transport
- Scheduled pickups that fit your facility’s operational calendar
Ready to hand off the compliance work? Request a quote from the Usedcartridge e-waste logistics team and get a clear scope and price for your battery collection.
Sources
The official sources below are the starting point for verifying any rule cited in this article. Regulations change; always confirm against the current version of the source before tendering a shipment.
- Lithium Battery Guide for Shippers | PHMSA
- Check the Box: Getting Started with Shipping Hazmat | US Department of Transportation
- 49 CFR § 173.185 – Lithium cells and batteries (LII / Cornell Law)
- Federal Register: Hazardous Materials: Enhanced Safety Provisions for Lithium Batteries (PHMSA final rule)
This article provides general compliance information about DOT hazardous materials regulations for lithium batteries. It is not a substitute for legal or regulatory advice. Confirm current rules with PHMSA, the applicable 49 CFR sections, and a qualified hazmat professional before tendering any regulated shipment.