Shipping Battery-Powered Welders in 2026: What Distributors Should Confirm Before Booking Freight

Battery-powered welders are moving from a niche category into a regular part of many distributors’ product ranges. For importers, however, the biggest delay is often not the machine itself, but the freight booking.

Battery-powered welding equipment cannot be booked from the product name alone. The battery model, watt-hour rating, packing configuration, transport mode, state of charge and carrier acceptance all decide whether a consignment can move as planned.

This article explains the current rules and shows what we confirm internally for two battery packs used in selected COROTC cordless welders.

1. What actually determines the shipping classification?

Four questions decide the classification before a forwarder can even request a booking.

Question	Why it matters	Evidence to collect
What is the battery model, voltage, capacity and Wh rating?	The watt-hour rating is central to lithium-ion classification	Battery nameplate, UN38.3 test report, specification sheet
Will the battery travel alone, be packed with the welder, or be installed in the welder?	“Alone”, “packed with equipment” and “contained in equipment” are treated differently	Packing list, packing photos, purchase order
Will the consignment move by air, sea, road or a combination?	Air, sea and U.S. domestic rules are not identical	Transport mode and route
Does the carrier accept the configuration?	Even a correctly classified consignment can be refused by an operator	Carrier or forwarder written confirmation

2. UN 3480 and UN 3481 are not the same thing

According to the IATA 2026 Battery Guidance Document, lithium-ion batteries are classified in Class 9 as:

UN 3480 — lithium-ion batteries offered for transport alone;
UN 3481 — lithium-ion batteries contained in equipment, or packed with equipment.

This distinction matters in practice:

Rule	Current IATA position
UN 3480 by air	Forbidden as cargo on passenger aircraft; packages prepared under PI 965 Section IA and IB must bear a Cargo Aircraft Only label
State of charge	UN 3480 batteries must be shipped at a state of charge not exceeding 30% of rated capacity, unless approval is obtained under the relevant State approvals
Batteries packed with equipment	From 1 January 2026, lithium-ion batteries packed with equipment under PI 966 Sections I and II must be offered at a reduced state of charge, subject to the conditions in the guidance
Batteries contained in equipment	IATA recommends, but does not mandate, a state of charge not exceeding 30% or an indicated battery capacity not exceeding 25%
UN38.3 evidence	Manufacturers and subsequent distributors must make a UN38.3 test summary available; it can be provided electronically, for example by a QR code or URL

IATA also confirms that all lithium-ion batteries are regulated as dangerous goods. A battery may be eligible for Section II treatment and exempted from certain labelling, packing or documentation requirements, but it is still regulated as a dangerous-goods commodity.

For sea freight, the applicable reference is the IMDG Code. The IMDG Code, 2024 Edition including Amendment 42-24, came into force on 1 January 2026 and is mandatory from 1 January 2026. For U.S. shipments, PHMSA states that lithium batteries are regulated as hazardous materials under the HMR and directs shippers to 49 CFR 173.185, with separate carrier restrictions also applying.

3. What our battery documents show

The table below summarizes the documents we hold for two battery packs used in selected COROTC cordless welders, and what the IATA 2026 flowchart means for these packs when the battery is offered for transport alone.

Battery pack	Rated specification	UN38.3 test report	MSDS/SDS	Air-transport implication if the battery travels alone as UN 3480
ET1840	18V, 4.0Ah, 72Wh	Report No. TSZ25FH001A01-01, issued 2025-07-14, Shenzhen Tiansu Calibration and Testing Co., Ltd.	Valid until 2026-12-31	UN 3480, PI 965 Section IB; Cargo Aircraft Only; not accepted as cargo on passenger aircraft
ET1860	18V, 6.0Ah, 108Wh	Report No. TSZ25EC023A01-01, issued 2025-05-28, Shenzhen Tiansu Calibration and Testing Co., Ltd.	Valid until 2026-12-31	UN 3480, PI 965 Section IA; Cargo Aircraft Only; not accepted as cargo on passenger aircraft

The most important point is this: a lower watt-hour rating does not mean a battery can be booked as ordinary air cargo. Under the IATA 2026 flowchart, a lithium-ion battery at 72Wh is below the 100Wh threshold and falls in UN 3480 PI 965 Section IB, while a 108Wh battery falls in UN 3480 PI 965 Section IA. Both are cargo-aircraft-only for standalone UN 3480 shipments.

Two qualifiers matter:

These entries describe the batteries when they are offered for transport alone. If the battery is installed in a welder or packed separately with a welder, the entry becomes UN 3481 and the packing instruction changes.
The table uses the rated Wh and the IATA 2026 flowchart. It does not replace the shipment-specific 2026 air and sea transport documents, the IMDG declaration, or the forwarder and carrier review.

4. A six-step checklist before booking freight

Identify the exact battery model, nominal voltage, ampere-hour capacity and Wh rating.
Define the shipping configuration: battery alone, packed with equipment, or contained in equipment.
Confirm the transport mode and route before choosing packaging.
Collect a matching UN38.3 test summary and available MSDS/SDS for the exact battery configuration.
Confirm the applicable packaging, marking, labelling and Cargo Aircraft Only requirements.
Obtain written carrier or forwarder acceptance before the goods leave the factory.

5. What COROTC provides

For selected cordless welder models equipped with ET1840 or ET1860 battery packs, COROTC can provide model-specific UN38.3 test reports and MSDS/SDS documents for buyer review. The final shipping method is then confirmed by the battery model, packing configuration, transport mode and carrier or forwarder review.

This helps distributors avoid the most expensive failure in battery-welder sourcing: a machine that is ready, but a battery declaration that is not.

References

UNECE, About the Manual of Tests and Criteria: https://unece.org/about-manual-tests-and-criteria
IATA, Battery Guidance Document for Lithium Batteries and Sodium Ion Batteries, 2026: https://www.iata.org/contentassets/05e6d8742b0047259bf3a700bc9d42b9/lithium-battery-guidance-document.pdf
IMO, IMDG Code, 2024 Edition including Amendment 42-24, mandatory from 1 January 2026: https://www.imo.org/en/publications/pages/imdg%20code.aspx
PHMSA, Lithium Batteries: https://www.phmsa.dot.gov/lithiumbatteries

Primary company documents reviewed on 2026-10-27: Shenzhen Tiansu UN38.3 test reports for ET1840 and ET1860; corresponding MSDS/SDS documents; 2026 air and sea transport documents are held for these battery packs and are matched to the specific shipment before booking.

Disclaimer: This article is a technical shipping explainer based on the listed public sources and internal documents reviewed on 27 October 2026. It is not legal advice. Always confirm the current regulations, operator variations and carrier requirements with your dangerous-goods professional, forwarder or carrier before shipping.

Shipping Battery-Powered Welders In 2026