The short answer
For lithium batteries, certificates are market-entry documents, not decoration. The ones B2B buyers see most are UN38.3 (required to ship any lithium battery anywhere), CE (EU market access, now framed by the EU Battery Regulation 2023/1542), UL 2271 (e-bike / light EV batteries in North America), IEC 62133 (international safety standard for portable cells and packs), RoHS (restricted substances in the EU) and MSDS (material safety data for transport and customs). Ask for the actual test report or certificate with the specific cell and pack model named — a generic PDF is not compliance.
Why certificates matter for importers
Customs, freight forwarders and market surveillance authorities check batteries more strictly than almost any other product. Missing or mismatched documents cause held shipments, fines and recalls. For an importer, the certificate set is part of the product itself: you inherit the supplier’s compliance, so verify it before the container is booked.
UN38.3 — the transport certificate
UN38.3 is the United Nations manual-of-tests requirement for lithium cells and batteries in transport (air, sea, road, rail). The test set covers altitude, thermal, vibration, shock, external short circuit, impact/crush, overcharge and forced discharge. Every cell and pack design needs its own UN38.3 test report; the report names the exact cell model and pack configuration. Shipping without it is not just risky — carriers refuse undeclared lithium cargo.
For the full shipping picture (packing, marking, state of charge rules) see our shipping lithium batteries guide.
CE and the EU Battery Regulation 2023/1542
CE marking indicates conformity with applicable EU directives and regulations. For batteries, the landscape has changed: Regulation (EU) 2023/1542 replaced the old Battery Directive and applies from 2024–2027 in stages. Key dates for importers:
- 18 August 2026 — physical battery labels with general information, including QR-code specifications, become mandatory.
- 18 February 2027 — digital battery passport with QR code mandatory for EV, LMT (e-bike, e-scooter) and industrial batteries above 2kWh.
- 18 August 2027 — supply-chain due diligence obligations apply (postponed by two years by Regulation (EU) 2025/1561).
- 18 February 2028 — maximum carbon-footprint thresholds phase in for EV batteries.
Our EU Battery Regulation guide walks through what importers must prepare.
UL 2271 — e-bike and LEV batteries
UL 2271 covers batteries for light electric vehicles — e-bikes, e-scooters, hoverboards. It is effectively required by many North American retailers and local regulations (such as NYC’s e-bike rules). If you sell e-bike batteries in the US or Canada, put UL 2271 on the must-have list; our e-bike packs are built with UL 2271 compliance in the documentation set.
IEC 62133 — the international safety baseline
IEC 62133 is the international safety standard for portable sealed cells and packs containing alkaline or non-acid electrolytes — in practice, most Li-ion products. It is widely referenced by retailers and by national certification schemes. A pack with IEC 62133 testing covers mechanical, electrical and environmental safety tests at cell and pack level.
RoHS and MSDS
RoHS restricts hazardous substances (lead, mercury, cadmium and others) in electrical products sold in the EU. MSDS (or SDS) is the material safety data sheet required for shipping and customs documentation — carriers want it for every battery consignment. Neither is a “certificate of quality”, but both are mandatory paperwork for EU and international trade.
What to ask your supplier
- Send the actual UN38.3 report and MSDS — not a generic “we are certified” line.
- Confirm the report names your cell model and pack configuration.
- Request CE technical file / declaration of conformity and RoHS test data.
- For e-bike or LEV packs, request UL 2271 documentation.
- Ask which certifications are included in the price and which are paid per project.
Frequently asked questions
Is one UN38.3 report enough for all my products?
No. The report covers one cell and one pack configuration. Change the cell brand or the series/parallel layout and a new test is needed for that design.
Does XINYUEGE provide the certificates with custom packs?
Yes — our packs are built with CE, RoHS, UN38.3, MSDS and UL 2271 in the documentation set, and the certification plan is agreed at the RFQ stage so there are no surprises at customs.
Can I reuse a competitor’s certificate?
No. Certificates are tied to the tested manufacturer, cell and design. Using another company’s report is both non-compliant and dangerous — the tested design is not yours.
Do these rules apply to prototype samples?
Yes — UN38.3 and MSDS apply to any lithium battery moved in commerce, including samples. Plan the test timing into your prototype schedule.
Get a compliance-mapped quote
Tell us your target markets via the custom battery inquiry form and we will map the required certificates into the proposal, with costs and lead times per document.
What UN38.3 actually tests
UN38.3 is a sequence of eight safety tests applied to the exact cell and pack design: T1 altitude simulation (low pressure), T2 thermal cycling, T3 vibration, T4 shock, T5 external short circuit, T6 impact or crush, T7 overcharge, and T8 forced discharge. Passing means the sample survived each test without fire, explosion or leakage. The report names the tested cell and pack models, the testing laboratory and the dates — so the document you hold must match the cells inside the pack you buy. A report for “the same type” of cell is not the same thing; check the model string on the report against the datasheet and the batch label.
Verifying certificates and planning ahead
For EU sales, CE marking is a manufacturer’s self-declaration backed by a technical file — and the EU Battery Regulation 2023/1542 now layers additional obligations on top: QR-code labelling from August 2026, battery passports for EV/LMT and large industrial batteries from February 2027, supply-chain due diligence from August 2027, and carbon-footprint declarations from February 2028. North American buyers should confirm UL 2271 (e-bike) or UL 1973 (storage) and UL 1642/UL 2580 as applicable. A serious supplier lists the certificate set in the quotation — if it is not in writing, treat it as not yet confirmed.
One practical habit saves most certificate problems: keep a folder per product with the UN38.3 report, the MSDS, the market certificates and the EU declaration of conformity, and re-verify the document dates before each new shipment. Certificates expire, test reports are revised when cell suppliers change, and regulations move — a certificate folder maintained once a year is worth more than a stack of PDFs from last year’s supplier.
Related: once the certificates are in hand, the next constraint is getting packs across the border — see shipping lithium batteries internationally for the document set, packaging and air freight rules.