5 Documents You Need for Every DOT Lithium Battery Shipment

5 Documents You Need for Every DOT Lithium Battery Shipment

A compliant DOT lithium battery shipment needs five things, and they have to agree with each other: a shipping paper carrying the proper shipping name, hazard class, UN number, total quantity, shipper's certification and a monitored emergency response telephone number; the lithium battery mark when the shipment moves under the Section II exception in 49 CFR 173.185(c); the Class 9 lithium battery label when it moves fully regulated instead; the word OVERPACK on the outer package if you have consolidated marked and labeled packages inside it; and the emergency response number itself, answered by a person who can actually speak to the hazards. Missing paperwork is the second most common reason a load gets refused at the dock. Paperwork that contradicts itself is the first.

The call usually comes at the end of the day. Dock guy, phone held out toward the trailer so I can hear the reefer idling behind him. "Driver won't take it." That's all I get. I walk out.

What's on the pallet is four AMR packs, 48 V, pulled because a cell group went soft and the robots started sagging at the end of long shifts. Each pack is in its own fiberboard box, taped, with a lithium battery mark I printed at 60 percent scale because the full-size mark looked absurd on a box that small. On top sits a shipping paper reading "Lithium Batteries, 9, UN3481." The emergency response telephone field is blank. It's blank because the template has the field and whoever filled it out just skipped it.

Three separate problems on one pallet, and not one of them is a missing document.

Start with the shipping paper

Under 172.202 the basic description runs in a fixed order: proper shipping name, hazard class, UN number, packing group. Lithium ion batteries have no packing group assigned in the Hazardous Materials Table, so that field stays empty. That empty field is where a surprising number of self-inflicted rejections come from, because people copy from a table that has a packing group column and fill it in with II. A clerk who stops to read your paper is a clerk who finds the next thing wrong on it.

The proper shipping name matters more than people expect. "Lithium ion batteries" is the entry. "Lithium batteries" alone is not, and lithium metal is a different entry with different UN numbers entirely. If the pack is installed in the robot, it's "Lithium ion batteries contained in equipment," UN3481. If it's in a box sitting next to the equipment, it's "packed with equipment," still UN3481. If it's bare on the pallet, it's UN3480. Same pack, same cells, three different descriptions depending on how it's moving.

You also need the total quantity and the number of packages, a signed shipper's certification, and the emergency response number. Legible and in English throughout. I have never watched a handwritten shipping paper survive a carrier's second look, even when it was clean on its face. Mine are typed.

The mark and the label are two different decisions

The lithium battery mark is the rectangle with the hatched border. UN number preceded by UN, and the battery description. It is what tells the carrier you're shipping under the exception, meaning small cells and batteries inside the watt-hour and package-quantity limits laid out in 173.185(c). Minimum size is 120 by 110 mm, with a reduced size permitted when the package is genuinely too small, provided the mark stays clearly visible and legible. Print it at actual size. My 60 percent version looked tidier and it was the first thing the driver pointed at.

The Class 9 lithium battery label is a different object entirely: the square hazard label with the battery pictograph and the flame, and the 9 in the bottom corner. That one belongs to the fully regulated pathway. And it has to be the lithium battery version of Class 9, not the generic Class 9 miscellaneous label with the black-and-white striped circle. I've watched that substitution stop a pickup dead. They are both Class 9. They are not interchangeable.

Which one you apply is a decision, not a decoration. I choose the pathway first, then put exactly what that pathway requires on the box. Both at once tells a carrier clerk you don't know which one you're in, and a clerk who thinks you don't know will want to open the box, the paperwork, or both.

The overpack rule, which is where palletizing gets people

49 CFR 173.25. If you take properly marked and labeled inner packages and put them inside something bigger, the outer package gets the word OVERPACK in letters at least 12 mm high, plus the required markings and labels, unless the inner markings and labels remain visible.

Where this bites in a robot shop is palletizing. Clear stretch wrap over boxes whose marks you can still read is one thing. A cardboard sleeve or a solid slip sheet around that same pallet is an overpack, and now the word has to appear on the outside of it. I've had a load held on exactly that: eight boxes, every one of them perfect, wrapped in a sleeve that hid the marks, and nothing on the exterior saying OVERPACK.

The emergency response number is a behavior, not a print job

172.604 puts the number on the shipping paper, requires it to be monitored at all times while the material is in transportation, and requires the person who answers to either be the offeror or have knowledge of the hazards. Third-party answering services are normal and fine. What matters is that whoever picks up has your safety data sheet in front of them and can actually speak to the pack.

This is the only item on the list that is a behavior instead of a print job, so it's the one I test. Once a quarter I dial the number printed on our shipping paper and see what happens. Voicemail, a switchboard that wants to know which department, or somebody who can't tell me what's in the box all mean the same thing: that number is non-compliant in operation no matter how good the paper looks.

One more thing about numbers. Editions of the lithium battery mark have varied on whether a telephone number belongs in it, so I don't treat the mark's phone number as the compliance trigger. What I do insist on is agreement. If there's a number on the mark, it's the same number as the one on the paper. Two different numbers on one box is an invitation to a conversation nobody wants at 4:30 on a Friday.

None of it works if the pack spec doesn't carry the data

Here's the part I'd tell anyone buying packs for robots. The document set is downstream of the pack specification, and it's effectively built months before the pallet exists. You cannot write a shipping paper from the outside of a box.

What your spec sheet and your purchase order need to carry is the data the paper and the pathway decision both depend on: cell chemistry, cell count, pack watt-hour rating, pack net weight, and whether the pack ships alone, in equipment, or with equipment. If the watt-hours aren't on the spec, you will be on the phone trying to get them, and what comes back will be a cell datasheet rather than a pack rating, and you'll be doing arithmetic against a delivery window.

The pathway itself is decided by the pack, not by the day. A 98 Wh pack shipped by itself may sit comfortably inside the exception. The same cells built into a larger assembly, or shipped in a configuration outside those limits, puts you on the fully regulated path without anyone making a decision about it. The pack changed, and the label requirement changed with it. That's why I want chemistry and watt-hours locked into the PO as delivery documents rather than collected at shipping time.

Worth saying plainly: the watt-hour limits, the package quantity limits, and the mark specifications have moved with the harmonization cycles and will move again. I re-read the current text of 173.185 before I sign off on any template revision. Anyone telling you they've used the same shipping paper for eight years is telling you they haven't looked.

What actually gets a pallet refused

Short, unordered, all of it things I've seen stop a load on a dock.

• A packing group on a lithium battery shipping paper. There isn't one.
• "Lithium batteries" instead of "Lithium ion batteries."
• No emergency response number, or a number that rings a desk after hours.
• The lithium battery mark printed undersized, or printed with a solid border instead of the hatched one.
• The generic Class 9 label standing in for the lithium battery Class 9 label.
• An overpack with the inner marks hidden and no OVERPACK on the outside.
• UN3480 on the paper and UN3481 on the mark, for the same box.
• A quantity field filled in with a package count where a weight was expected.
• An unsigned shipper's certification block.
• A carrier's own form used in place of the shipping paper because the layout is nicer, but with no certification block and no telephone number on it.

Almost none of those are knowledge problems. They're transcription problems. Somebody is copying from something, and the something doesn't match the box.

What I keep is a card taped above the shipping bench with the five items on it and two questions underneath. Which pathway are we in. Does the number get answered. Everything past those two questions is a template, and templates are easy.