One-line definition: Lithium battery shipping rules are carrier and regulatory requirements that govern how products containing lithium batteries must be declared, packaged, and transported - because lithium batteries can overheat, catch fire, or explode if mishandled in transit.
What it means
Lithium batteries power almost every modern consumer electronics product — phones, laptops, tablets, wireless earbuds, power banks, smart watches, cameras, drones, e-bikes, vaping devices, and thousands of other products. They are also the most commonly mishandled dangerous goods category in e-commerce shipping, because merchants who would never think of themselves as shipping hazardous materials do not realize the product in their box is classified as one.
Lithium batteries can undergo a process called thermal runaway — a chain reaction that causes the battery to overheat rapidly, generating intense heat and potentially fire. Thermal runaway can be triggered by physical damage, short circuits, manufacturing defects, or improper charging. In a carrier's sorting hub or aircraft hold, a single battery fire can escalate quickly and has caused fatal accidents in aviation. This is why lithium battery shipping regulations exist and why carriers and transport authorities enforce them seriously.
For e-commerce merchants, understanding the rules is not optional. Shipping a lithium battery-containing product without the correct declaration is a breach of carrier terms, a potential regulatory violation, and in the case of air transport, a serious aviation safety issue.
Why it matters for e-commerce merchants
If you sell any of the following, you are shipping lithium batteries and the rules apply to you:
- Smartphones, tablets, laptops, or any rechargeable device
- Power banks and portable chargers
- Wireless earbuds, headphones, or speakers
- Smart watches, fitness trackers, or wearables
- Cameras, action cameras, or drones
- Electric scooters, e-bikes, or hoverboards (typically larger batteries with stricter rules)
- Vaping devices and e-cigarettes
- LED lighting with built-in rechargeable batteries
- Toys with built-in rechargeable batteries
- Any product with a built-in battery that cannot be easily removed
The consequence of shipping without correct declaration varies by carrier and severity. At minimum: the shipment is refused or removed from the carrier network. More seriously: your carrier account is suspended. Most seriously: if undeclared batteries are discovered on an aircraft, the incident is reported to aviation safety authorities and the sender faces regulatory investigation.
The two types of lithium battery
The rules differ depending on the type of battery in your product.
Lithium ion (Li-ion) Rechargeable batteries used in most modern consumer electronics — phones, laptops, power banks, wireless earbuds. The key measurement for shipping purposes is the watt-hour (Wh) rating. This is usually printed on the battery itself or available in the product's technical specifications.
Lithium metal (Li-metal) Non-rechargeable batteries — often found in cameras (certain types), hearing aids, coin cell batteries, and some specialized devices. The key measurement is the lithium content in grams (g).
Both types are classified as UN Class 9 dangerous goods. Lithium ion batteries carry UN number UN3480 (batteries alone) or UN3481 (batteries in or packed with equipment). Lithium metal batteries are UN3090 (alone) or UN3091 (in or packed with equipment).
The three shipping configurations and their restrictions
Regulations treat lithium batteries differently depending on how they are configured in the shipment:
Contained in equipment The battery is installed inside the device and is not separately packaged. A phone with its battery inside. A laptop with its battery installed. This is the least restricted configuration for most consumer products and is what most standard e-commerce shipments look like.
Packed with equipment The battery is separately packaged in the same box as the device — for example, a spare battery shipped alongside the device it is designed for. More restricted than contained in equipment.
Battery only (standalone) The battery is shipped without the device — a replacement battery, a power bank sold on its own, or spare batteries. Most restricted configuration. Standalone lithium ion batteries above certain watt-hour thresholds cannot be shipped by air at all in standard commercial shipments.
Road vs air - why the distinction matters
The transport mode is the single most important variable in lithium battery shipping restrictions.
Road transport (standard European parcel carriers) Most standard parcel carriers in Europe transport shipments by road for domestic and near-European routes. ADR governs road transport of dangerous goods in Europe. Under ADR, consumer electronics with batteries (phones, laptops, tablets in their retail packaging) typically qualify as consumer commodities or limited quantities and can be shipped with simplified requirements — correct packaging, a small limited quantity diamond mark on the outer packaging, and correct booking declaration. Full dangerous goods documentation is not required for qualifying small quantities.
Air transport (express international courier services) Any shipment with an air leg — DHL Express international, FedEx International Priority, UPS Express international — is subject to IATA Dangerous Goods Regulations (IATA DGR) in addition to the ground-side regulations. IATA DGR restrictions on lithium batteries are significantly stricter than road ADR.
Key IATA DGR restrictions for lithium batteries (current as of early 2025):
| Battery type | Contained in equipment | Packed with equipment | Battery only |
|---|---|---|---|
| Lithium ion | Permitted if ≤100 Wh per battery; ≤2 spare batteries per package | Permitted with restrictions | Only if ≤100 Wh; max 2 per package in specific conditions |
| Lithium ion (large) | >100 Wh requires special cargo aircraft only | As battery only | Forbidden on passenger aircraft above thresholds |
| Lithium metal | Permitted if ≤2g lithium content | Permitted with restrictions | Restricted / forbidden above thresholds |
IATA DGR thresholds and conditions are updated annually. Always verify current rules with your carrier or the IATA DGR publication before shipping.
For most standard consumer electronics — a phone, a pair of wireless earbuds, a laptop — the contained-in-equipment configuration falls within standard acceptance on passenger aircraft cargo if the watt-hour rating is within limits. The issue arises with high-capacity batteries (large power banks, e-bike batteries) and standalone battery shipments, where acceptance is restricted or forbidden.
State of charge requirements
IATA DGR also specifies that lithium ion batteries shipped as cargo must be at or below 30% state of charge (SoC) — meaning partially discharged, not fully charged — to reduce thermal runaway risk. For retail consumer electronics shipped in their original packaging, the manufacturer's handling of state of charge at packing is typically sufficient. For merchants packing and shipping products themselves, checking that batteries are not fully charged at despatch is a compliance requirement for air transport.
What you need to do in practice
Identify the battery in every product you ship. For each product containing a battery, know: is it lithium ion or lithium metal? What is the watt-hour rating (Li-ion) or lithium content in grams (Li-metal)? Is it contained in the device, packed alongside it, or shipped standalone?
Check carrier acceptance policies. Every major carrier publishes its dangerous goods acceptance policy for lithium batteries. DHL, FedEx, and UPS each have specific guides. Check the policy for the specific service you are using — DHL Express may have different acceptance criteria from DHL eCommerce Parcel Connect for the same product.
Declare at booking. When booking a shipment containing lithium batteries through any carrier platform, use the carrier's dangerous goods declaration fields to identify the battery type and configuration. Do not omit this because the booking form allows it — the responsibility for declaration lies with the sender.
Apply required markings. For standard consumer electronics within ADR limited quantity thresholds, a small limited quantity diamond mark on the outer packaging is required. For shipments requiring full dangerous goods treatment, the relevant Class 9 hazard label and UN markings apply.
Follow packaging requirements. Batteries must be protected against short circuits — terminals covered or taped, inner packaging preventing contact between batteries or with conductive materials. Outer packaging must be robust enough to withstand normal shipping conditions.
Common misconceptions and mistakes
"It's just a phone — the carrier won't care." Carriers care significantly. Airlines especially. The consequences of undeclared lithium batteries on aircraft are serious enough that aviation authorities and carriers actively monitor for compliance. A merchant account that generates repeated undeclared dangerous goods incidents will be suspended.
"The product is in retail packaging so it must be fine." Retail packaging meets consumer safety standards, not necessarily transport dangerous goods packaging standards. Check whether your product's retail packaging meets the carrier's requirements for the service you are using — particularly for air transport.
"I ship by road so air restrictions don't apply." Even road-based parcel services may include air legs for international shipments. A PostNord parcel from Sweden to Finland travels by road. A DHL eCommerce shipment from Finland to the USA is primarily air. Know your carrier's transport mode for each service and route before assuming road-only restrictions apply.
"Large power banks are fine to ship internationally." High-capacity power banks — above 100 Wh — are restricted or forbidden on passenger aircraft. Many popular power banks sold in the 20,000–30,000 mAh range exceed 100 Wh. Check the watt-hour rating of every power bank you ship before booking an air service.
Frequently asked questions
How do I calculate the watt-hour rating of a battery? The watt-hour (Wh) rating is calculated as: Wh = Voltage (V) × Capacity (Ah). If the battery states 3.7V and 5000mAh (5Ah), the watt-hour rating is 3.7 × 5 = 18.5 Wh — well within standard acceptance thresholds. Many batteries print the Wh rating directly on the label. If only milliamp-hours (mAh) are stated without voltage, use the nominal cell voltage for that battery chemistry (3.6V or 3.7V for standard lithium ion) to calculate Wh.
Can I ship e-bike batteries internationally? E-bike batteries are typically large lithium ion batteries — often 300–700 Wh — which are significantly above IATA DGR thresholds for passenger aircraft and require cargo aircraft-only shipment. By road within Europe, they are subject to ADR requirements as Class 9 dangerous goods and typically require full dangerous goods documentation rather than the limited quantity exemptions available for small consumer electronics. E-bike battery shipping by international courier is heavily restricted or not possible via standard services — consult a specialist dangerous goods freight forwarder.
Do the rules apply to used or refurbished electronics? Yes. The dangerous goods classification applies to any product containing a lithium battery regardless of whether it is new, used, or refurbished. Used batteries may have additional risk factors — physical damage, degradation, or previous thermal events — that increase the importance of correct packaging and state of charge management.
What is Section II and Section IA in IATA DGR for lithium batteries? IATA DGR organizes lithium battery shipping requirements into sections based on battery size and configuration. Section II covers standard consumer electronics within the most common thresholds — typically ≤100 Wh for lithium ion contained in or packed with equipment. Section IA and IB cover larger or standalone batteries with stricter requirements. For most Shopify merchants shipping standard consumer electronics, Section II applies. Familiarity with which section your products fall under helps you understand the specific documentation, packaging, and state of charge requirements that apply.
What should I do if my carrier refuses a lithium battery shipment? First, clarify the reason for refusal — is it a missing declaration, an exceeded threshold, incorrect packaging, or an acceptance policy change? If the refusal is due to a missing declaration, correcting the booking and re-presenting the shipment may resolve it. If the battery exceeds the carrier's acceptance thresholds for that service, you may need to find a carrier with a dangerous goods acceptance programme for that product type, use a surface-only service instead of air, or engage a specialist dangerous goods freight forwarder. Do not attempt to re-present an undeclared dangerous goods shipment without correcting the underlying compliance issue.
