How to ship lithium batteries

Lithium batteries power almost everything now — phones, laptops, power tools, e-bikes, electric vehicles, medical devices. And every one of them is, for shipping purposes, a regulated hazardous material. That’s not bureaucratic caution: damaged, short-circuited, or improperly packed lithium batteries can overheat, ignite, and cause fires that are extremely hard to extinguish. Shipping them safely and in compliance isn’t optional — it’s the law, and it’s the responsible thing to do. Here’s what you need to know: the types, ten practical tips, and how a freight brokerage keeps you compliant.

What are lithium batteries?

“Lithium battery” is an umbrella term, and the shipping rules distinguish between two main types. Knowing which you have matters, because they’re regulated differently.

Lithium metal batteries

Lithium metal batteries use lithium metal as the anode and are usually non-rechargeable (primary cells). You’ll find them in devices that need long shelf life and steady output — watches, cameras, some medical devices, certain sensors and remote equipment. Because lithium metal is highly reactive, these batteries carry their own specific shipping classification (UN3090 when shipped alone, UN3091 when packed with or contained in equipment).

Lithium-ion batteries

Lithium-ion (and lithium-polymer) batteries are rechargeable and are by far the most common type today — they power phones, laptops, power tools, e-bikes, EVs, and most modern electronics. They store energy in a lithium compound rather than lithium metal. They have their own shipping classifications too (UN3480 when shipped alone, UN3481 when packed with or contained in equipment).

The practical takeaway: both types are regulated for transport, both can be dangerous if damaged or shorted, and the exact rules — packaging, labeling, quantity limits, and especially air vs. ground — depend on the type, the watt-hour rating or lithium content, and whether the batteries ship alone or installed in equipment. When in doubt, treat them as the regulated hazmat they are and get expert help.

Essential tips for safely shipping lithium batteries

Here are ten practical tips that cover the fundamentals of shipping lithium batteries safely. They apply broadly; the precise regulatory requirements depend on your specific batteries and mode, which is exactly where a hazmat-experienced broker earns its keep.

1. Protect the terminals. Exposed battery terminals are the most common cause of a short circuit. Cover terminals with non-conductive caps or tape, or keep batteries in their original retail packaging, so terminals can’t contact metal or each other.

2. Package each battery individually. Pack batteries so they can’t move, shift, or contact one another in transit. Individual inner packaging — a slot, a sleeve, or the original blister pack — keeps each cell isolated and immobilized.

3. Isolate batteries from each other and from conductive materials. Use non-conductive dividers, trays, or cushioning to separate batteries and keep them away from anything metal. A loose battery rattling against another battery or a metal object is a short waiting to happen.

4. Deactivate or disconnect devices. When shipping batteries installed in equipment, make sure the device is fully switched off and can’t accidentally turn on in transit (which generates heat). Where possible, disconnect or isolate the battery within the device.

5. Protect against heat. Lithium batteries are sensitive to temperature. Don’t ship them in conditions that expose them to excessive heat, and keep them away from heat sources during handling and storage. Heat accelerates every failure mode.

6. Use strong, rated outer packaging. Pack batteries in sturdy, rigid outer boxes that can withstand the rigors of freight handling — crushing, dropping, stacking. The packaging must keep the contents protected and immobilized even if the box is mishandled.

7. Prevent crushing and puncture. A punctured or crushed lithium cell can ignite. Cushion batteries well and use packaging rigid enough that normal handling can’t deform or pierce a cell.

8. Label and mark correctly. Lithium battery shipments require the proper hazard markings, labels, and (where applicable) the lithium battery mark, with the correct UN number for the type. Incorrect or missing markings are one of the most common compliance failures — and they can get a shipment rejected or held.

9. Complete the right documentation. Depending on type, quantity, and mode, lithium battery shipments may require specific shipping papers and declarations. Accurate paperwork that matches the contents is part of legal, safe transport — not an afterthought.

10. Know your mode’s rules — especially air. Lithium battery rules are strictest for air transport (tight quantity limits, state-of-charge limits, specific packaging). Ground freight has its own requirements. Choosing the right mode and meeting its specific rules is essential — and is exactly the kind of decision to make with an expert, not a guess.

These ten cover the fundamentals, but lithium battery regulations are detailed and change with the type, the watt-hours or lithium content, the quantity, and the mode. The right approach is to follow the fundamentals and get expert guidance on the specifics for your shipment.

The role of a freight brokerage in shipping lithium batteries

This is where shipping lithium batteries gets genuinely easier — and safer. Lithium batteries are classified hazardous materials, and the regulations (DOT in the U.S., plus IATA for air and IMDG for ocean) are detailed, mode-specific, and unforgiving of mistakes. Getting it wrong risks rejected shipments, fines, delays, and real safety hazards. A freight brokerage experienced in hazardous materials takes that burden off you.

A hazmat-experienced broker helps in concrete ways:

• Classification and compliance. Determining the correct UN classification, packaging group, and requirements for your specific batteries — type, watt-hours or lithium content, quantity, and whether they ship alone or in equipment.
• Packaging and labeling guidance. Making sure the packaging, markings, labels, and the lithium battery mark meet the regulations for your mode, so the shipment isn’t rejected at handoff.
• Carrier matching. Routing your batteries to carriers properly authorized and equipped to handle hazmat — not every carrier accepts lithium batteries, and the wrong one means a held or returned shipment.
• Documentation. Ensuring the shipping papers and declarations are complete and accurate, matching the contents.
• Mode selection. Advising whether ground or air is appropriate given the strict air-transport limits, and routing accordingly.

In short, a broker with hazmat expertise turns a complex, high-stakes compliance problem into a managed shipment. RS Group ships hazardous materials — including lithium batteries — across a network of 34,000+ carriers, with the classification, packaging guidance, and carrier matching that keep your shipment safe, compliant, and moving.

Ship lithium batteries the right way

Lithium batteries are regulated as hazardous materials because, handled carelessly, they’re genuinely dangerous — and because, handled correctly, they ship safely every day. Protect the terminals, isolate and immobilize each cell, package and label correctly, mind your mode’s rules, and get expert help on the specifics. The fundamentals plus the right partner is what keeps a lithium battery shipment safe, legal, and on time.

Don’t navigate hazmat compliance alone. RS Group’s hazardous materials freight service handles lithium batteries and other regulated freight with the expertise to keep you compliant. Tell us what you’re shipping and where, and get a freight quote — we’ll classify it, spec the packaging, match the right carrier, and follow it to delivery.