Lithium Metal Battery Shipping Labels Guide

In the world of international air and ocean freight, lithium metal batteries are often regarded as "high-risk cargo at your fingertips" due to their high energy density and volatile chemical properties. Even a tiny coin cell, if missing the correct Lithium Metal Battery Shipping Labels, can lead to entire shipments being seized by customs, heavy fines from airlines, or even catastrophic safety incidents during transit.

This article provides a comprehensive guide to everything you need to know, from distinguishing UN numbers and mastering size specifications to avoiding common pitfalls, ensuring your cargo clears customs smoothly and reaches its destination safely.

What Are Lithium Metal Battery Shipping Labels?

Transporting lithium metal batteries is a highly regulated activity, as these batteries are classified as Class 9 dangerous goods. To ensure transportation safety, the International Civil Aviation Organization (ICAO), the International Maritime Organization (IMO), and transportation authorities of various countries all require specific compliant labels to be affixed to the exterior of the packaging.

Below is a detailed classification and usage requirements for lithium metal battery transportation labels:

1. Lithium Battery Mark

This is the most common mark, primarily used for "Excepted" or "Section II" shipments (such as common consumer electronics).

Appearance: A white background with a red hatched border. The icon features a group of batteries, one of which is emitting smoke/flames.

Mandatory Information:

• UN Number: Must include the relevant UN code (e.g., UN 3090 for batteries alone, or UN 3091 for batteries contained in/packed with equipment).
• Phone Number: A valid telephone number for additional information must be provided.

Usage: Used when the batteries meet specific low-energy or small-quantity exceptions.

2. Class 9 Miscellaneous Dangerous Goods Label

When battery quantities or energy levels exceed certain limits, the shipment is "fully regulated" and requires a formal hazard label.

• Appearance: The top half features black vertical stripes, and the bottom half is white.
• Special Category: For lithium batteries, the Class 9A label is used. It adds a graphic of a battery cluster with smoke to the bottom half.
• Meaning: This indicates the package is a fully regulated hazardous material requiring professional handling and a dangerous goods declaration (DGD).

3. "Cargo Aircraft Only" (CAO) Label

Lithium metal batteries (especially when shipped alone) are extremely difficult to extinguish in the event of a fire, leading to strict air travel restrictions.

• Appearance: An orange background with black graphics and the text "CARGO AIRCRAFT ONLY".
• Requirement: Most standalone lithium metal batteries (UN 3090) are strictly prohibited on passenger aircraft and must bear this label.

4. Common UN Number Reference Table

Accuracy is critical when filling out the UN number on your labels:

When Are Lithium Metal Battery Shipping Labels Required?

The requirement for lithium metal battery shipping labels primarily depends on the lithium content (energy level), the packaging method, and the quantity being shipped.

1. When Labels are Mandatory

In the vast majority of commercial shipping scenarios, labels must be applied:

Standalone Batteries (UN 3090): If you are shipping lithium metal batteries by themselves (e.g., bulk batteries, spare batteries), both the Lithium Battery Mark and the Cargo Aircraft Only label are almost always required, regardless of quantity.

Exceeding Small Quantity Limits: Even for small batteries, labels are required if a single package contains:

• More than 4 cells installed in equipment.
• OR more than 2 battery packs installed in equipment.

Large/High-Capacity Batteries: For lithium metal, if a single cell exceeds 1 gram of lithium content.

• OR if a single battery pack exceeds 2 grams of lithium content.
• These are considered "Fully Regulated" dangerous goods and must bear the Class 9A hazard label.

2. When Labels May Be Exempted (Exceptions)

In very specific cases, labels may not be required (referred to as "Excepted" quantities) if all of the following conditions are met:

• Installed in Equipment: The batteries must be contained within the electronic device (e.g., a coin cell battery on a motherboard).
• Minimal Quantity: There are no more than 4 cells or 2 batteries per package.
• Non-Bulk Shipments: This generally applies to small individual shipments. If multiple such packages are consolidated on a single pallet (overpack), the pallet itself may still require labeling.

3. Special Requirements by Transport Mode

UN3090 vs UN3091 – What's the Difference?

The core difference between UN 3090 and UN 3091 lies in how the battery is packaged relative to the device it powers.

1. UN 3090: Lithium Metal Batteries

This refers to batteries being shipped by themselves.

• Definition: The package contains only batteries and no equipment.
• Examples: A box of 100 bulk lithium batteries from a wholesaler, or a single spare battery sent as a replacement.
• Transport Restrictions: * Strictly Prohibited on passenger aircraft (Cargo Aircraft Only). This is the most heavily regulated category because the batteries have no external protection, making them highly susceptible to short circuits and fire.
• Labeling: Must have the Lithium Battery Mark (marked with UN 3090) + the "Cargo Aircraft Only" label.

2. UN 3091: Lithium Metal Batteries with Equipment

This refers to batteries that are in the same package as the device they are intended to power. This is subdivided into two categories:

A. Packed with Equipment

• The Scenario: The battery is outside the device but inside the same retail box.
• Example: A high-end flashlight where the battery is in a separate plastic baggy next to the flashlight, but hasn't been inserted yet.

B. Contained in Equipment

• The Scenario: The battery is already installed inside the machine.
• Example: A coin cell battery on a computer motherboard, a smartwatch with the battery inside, or an electronic thermometer.

Lithium Metal Battery Label Size and Design Requirements

Shipping labels for lithium metal batteries have strict requirements regarding dimensions, color, and design details based on international standards (primarily IATA for air and IMO for sea).

If a label is non-compliant-such as being too small or having the wrong colors-your shipment is highly likely to be rejected by customs or the carrier. Here are the detailed design specifications:

1. Dimensions of the Lithium Battery Mark

This is the most frequently used mark (for UN 3090 / UN 3091).

• Standard Size: Minimum 100 mm × 100 mm.
• Reduced Size: If the package is too small to fit the standard label, it may be reduced, but must not be smaller than 100 mm × 70 mm.
• Border Design: The border must have red hatched stripes, and the width of the hatching must be at least 5 mm.

2. Dimensions of the Class 9A Hazard Label

For batteries that exceed energy limits and require a formal hazard label:

• Standard Size: Must be a square set at an angle of 45° (diamond shape), minimum 100 mm × 100 mm.
• Line Specifications: There must be a line of the same color as the symbol (black), positioned approximately 5 mm inside the edge and parallel to it.
• Symbol Design: The upper half features seven black vertical stripes. The lower half must contain a group of black battery icons (one intact on the left and one emitting flames on the right), with the numeral "9" displayed at the bottom.

3. Design and Color Requirements

Visual clarity is paramount so that handlers can quickly identify the risks even in dim cargo holds.

• Background Color: Must be white or a background of high contrast.
• Icon Color: The battery cluster icon and all text must be black.
• Border Color: The border of the Lithium Battery Mark must be red.
• Durability: Labels must be weatherproof. The symbols and text must remain legible even if exposed to rain or moisture.

4. Mandatory Textual Information

Within the design of the Lithium Battery Mark, the following information is indispensable:

• UN Number: The font height is typically recommended to be at least 12 mm. You must print UN 3090 or UN 3091, as applicable.
• Contact Phone Number: The label must include a valid telephone number (often a 24-hour emergency contact number) for obtaining additional information in case the package is damaged.

5. Placement "Dos and Don'ts"

Even a perfectly designed label can be non-compliant if placed incorrectly:

• Do Not Fold: The label must be placed on a single flat surface of the package. It is strictly forbidden to fold a label over an edge or corner.
• Do Not Obscure: The label must not be covered by tape, stretch wrap, waybills, or any other markings.
• Do Not Conflict: Ensure no contradictory labels appear on the same box (e.g., if the content is UN 3091, do not also leave an old UN 3090 label on the box).

How to Properly Attach Lithium Metal Battery Labels?

To properly attach lithium metal battery labels, follow these four core principles:

• Attach Flat: Labels must be placed on a single flat surface of the package. Never fold a label over an edge or corner, as this makes it difficult to read or scan.
• No Obstructions: The label must not be covered by anything, including clear tape (which can cause glare), stretch wrap, waybills, or other shipping stickers.
• Side Placement: It is best to place the label on the side of the box. Avoid the top or bottom, as labels there are easily obscured when packages are stacked.
• Clear Visibility: If you are using multiple labels (like the Lithium Battery Mark plus the "Cargo Aircraft Only" label), place them side-by-side. Do not overlap them.

Can You Download Printable Lithium Metal Battery Shipping Labels?

Yes, you can download and print these labels from many official or professional logistics websites. However, you must follow these rules:

• Color Printing: The border of the Lithium Battery Mark must be red. Black-and-white prints may result in the package being rejected.
• Accurate Size: The printed size must be at least 100 mm × 100 mm (or a minimum of 100 mm × 70 mm for very small packages).
• Complete Information: After printing, do not forget to fill in the correct UN number (e.g., UN 3090 or UN 3091) and a valid contact phone number.

Where to Buy Compliant Lithium Metal Battery Shipping Labels?

You can purchase compliant labels from professional hazardous materials suppliers like Labelmaster, LabelValue, or Seton, or find them quickly on major e-commerce platforms such as Amazon, Walmart, or Staples by searching for "Lithium Battery Shipping Labels."

Common Mistakes That Can Cause Shipping Delays

The most common mistakes include omitting the UN number or contact phone number on the label, or using the wrong UN code (e.g., mislabeling standalone batteries as batteries contained in equipment).

Additionally, using black-and-white prints instead of red-bordered labels, folding labels over the edges of the box, covering labels with reflective tape, or leaving old, obsolete labels on the packaging will almost certainly result in shipment delays or rejections during security or customs clearance.

FAQ

Is it mandatory to apply a lithium metal battery shipping label?

Yes, it is mandatory in the vast majority of commercial shipping scenarios. According to ICAO and IMO regulations, labels must be applied if the lithium content exceeds specific limits (such as 1 gram per cell or 2 grams per battery pack) or if a single package contains more than 4 cells (or 2 batteries) installed in equipment. Even for "excepted" quantities, labels are generally required for standalone lithium metal batteries (UN3090) to warn of fire risks during transit.

Can lithium metal battery shipping labels be printed in black and white?

No, lithium metal battery shipping labels absolutely cannot be printed in black and white. According to IATA and IMO regulations, the Lithium Battery Mark must feature a red hatched border to ensure high visibility and immediate recognition throughout the global supply chain. Using a black-and-white label will likely result in your package being rejected by the carrier or being flagged and delayed by airport security and customs.

At what watt-hour (Wh) rating is a lithium metal battery label required?

For lithium metal batteries, the threshold is typically measured in lithium content (grams) rather than watt-hours (Wh), which is a metric usually reserved for lithium-ion batteries. According to international regulations, a label is mandatory if a single cell contains more than 1 gram of lithium or if a battery pack exceeds 2 grams of total lithium content; even below these limits, a lithium battery mark is generally required if a single package contains more than 4 cells or 2 batteries.

Are small quantities of lithium metal batteries exempt from labeling requirements?

Exemptions are only permitted in very limited circumstances: labeling is typically not required if the lithium metal batteries are already installed in equipment and there are fewer than 4 cells (or 2 batteries) per package. However, if you are shipping standalone spare batteries (UN 3090), they are generally not exempt regardless of how small the quantity is, and must bear the appropriate Lithium Battery Mark and "Cargo Aircraft Only" label.

What Does a UN3090 Lithium Battery Mark Indicate?

The UN3090 marking indicates that the battery is a lithium metal battery intended for transport in its own right (not installed in equipment). This classification of the battery type is based on the United Nations number (UN number) for the transport of dangerous goods. Packages bearing the UN3090 marking contain single-use lithium metal batteries.

Which Labels Are Required for U.S. Ground Shipments of Small Standalone Lithium Metal Batteries?

When transporting small, individually packaged lithium metal batteries by road within the United States, a lithium battery label must be affixed to the outer packaging. This label must include a battery symbol, the UN 3090 number, and an emergency contact phone number to indicate that the package contains lithium batteries and to provide emergency contact information.

For shipments that meet the criteria for the small battery exemption, it is generally not necessary to affix a traditional Class 9 hazardous materials label. However, if the shipment exceeds the specified limits or does not meet the exemption criteria, a Class 9 hazardous materials label must be affixed, and the shipment must be handled in accordance with all applicable hazardous materials transport requirements.

Does a Lithium Battery Label Have to Be Printed in Color?

There is no mandatory requirement for lithium battery labels to be printed in color. According to regulations, black-and-white versions are also permitted, provided that the graphics, borders, and content are clearly legible and the contrast is sufficient. However, in actual shipping operations, many carriers or logistics companies prefer color labels with red borders, as these are more intuitive and easier to identify, and can effectively reduce the risk of shipment rejection.