UL 1642 certified lithium batteries are increasingly specified by procurement teams, OEM engineers, and system integrators who need documented proof that the cells inside a battery have been independently evaluated for safety — not just the manufacturer’s word.
Lithium batteries power an enormous range of applications — from RV and marine systems to telecom infrastructure, solar installations, and industrial backup power. But not all lithium batteries are created equal, and certification status at the cell level is one of the strongest indicators of documented safety evaluation, manufacturing consistency, and supplier quality.
Third-party certification is not just a checkbox. In many commercial and industrial projects, certification status can directly impact vendor approval, project sign-off, and procurement timelines. For lithium battery cells used across North American markets, UL 1642 is one of the key standards buyers should understand.
This article explains what UL 1642 covers, why it matters to buyers and specifiers, and what to look for when sourcing certified lithium batteries for your next project.
In This Article
- What Is UL 1642?
- What Does UL 1642 Actually Test?
- UL 1642 Cells vs. Complete Battery Systems
- Why Certification Matters for Procurement
- Applications That Benefit from Batteries Built with UL 1642 Certified Cells
- UL 1642 vs. Other UL Lithium Standards
- What to Look for in a UL 1642 Certified Lithium Battery Supplier
- Canbat’s UL 1642 Certification
- Frequently Asked Questions
What Is UL 1642?
UL 1642 is the Standard for Safety for Lithium Batteries, published by UL Solutions. It establishes the component-level safety requirements for primary (non-rechargeable) and secondary (rechargeable) lithium battery cells — covering lithium-ion, lithium iron phosphate (LiFePO4), lithium metal, and related rechargeable lithium technologies — intended for use as power sources across a wide range of products and applications.
The standard is maintained and administered by UL Solutions and is one of the most widely recognized lithium battery safety standards across North American markets. UL 1642 is specifically a cell-level component standard — it evaluates individual electrochemical cells rather than complete battery packs or integrated battery systems.
Cells evaluated to UL 1642 may be eligible to carry the UL Recognized Component Mark under UL Follow-Up Services requirements — confirming that representative samples of those cells have been independently evaluated and found to meet UL’s component-level safety requirements. This is distinct from a UL Listed complete product, which involves system-level evaluation.
What Does UL 1642 Actually Test?
UL 1642 subjects lithium battery cells to a rigorous series of abuse and performance evaluations designed to assess cell behavior under defined stress and failure conditions. The key evaluation areas include:
- Electrical safety — short circuit, abnormal charging, forced discharge, and overcharge evaluations
- Mechanical integrity — crush, impact, shock, vibration, and drop testing
- Thermal performance — behavior under heating, temperature cycling, and low-pressure (altitude) conditions
- Projectile resistance — exposure to fire to evaluate whether the cell poses a projectile hazard under extreme conditions
- Leakage and venting — evaluating cells for risks such as hazardous material leakage and uncontrolled venting under defined test conditions
- Labelling and construction — confirming cells meet identification and build quality requirements
These evaluations are conducted on representative cell samples by UL Solutions engineers. Certification requires independent laboratory testing — it is not self-declared. Certified manufacturers are subject to ongoing UL Follow-Up Services, including regular onsite inspections, to verify that production cells continue to meet the same requirements as those originally evaluated.
UL 1642 Cells vs. Complete Battery Systems
A precise understanding of what UL 1642 covers — and what it does not — helps procurement buyers ask the right questions. UL 1642 is a component-level standard applying to individual lithium cells, not to complete battery packs or integrated battery systems.
Complete battery systems may require evaluation under additional standards depending on the end application — such as UL 2054 for household and commercial battery packs, or UL 1973 for stationary energy storage and telecom backup systems. UL 1642 cell-level certification is the foundational starting point that supports this broader compliance pathway.
For procurement buyers, confirming whether the cells inside a lithium battery carry UL 1642 Recognized Component status is the right first question — it establishes the safety evaluation baseline at the component level before broader system certifications are considered.
Why Certification Matters for Procurement
For B2B buyers, project managers, and procurement teams, UL 1642 certification carries practical weight across several important dimensions.
Project and tender compliance
Commercial, industrial, and government projects increasingly specify UL-evaluated lithium battery components as a baseline procurement requirement. A battery whose cells have not been evaluated to UL 1642 may not meet specification requirements — regardless of price or availability. Confirming cell certification status before supplier selection avoids costly re-specification later in a project cycle.
Approved vendor and equipment lists
System integrators and OEM manufacturers routinely maintain approved component lists for recurring projects. Sourcing from a supplier with UL 1642 evaluated cells simplifies equipment qualification and reduces the documentation burden during product approval processes.
Third-party verification
Certification means an independent body — not the manufacturer — has evaluated the cells against a published safety standard. This gives procurement teams a defensible basis for supplier selection and reduces reliance on manufacturer-supplied test data alone.
Long-term production consistency
UL 1642 certification is not a one-time laboratory event. Certified manufacturers are subject to continued production surveillance under UL’s ongoing Follow-Up Services — including regular onsite inspections — to verify that cells in production continue to meet the same requirements as those originally evaluated.
Applications That Benefit from Batteries Built with UL 1642 Certified Cells
UL 1642 certified lithium batteries are relevant across a wide range of applications where independently evaluated cell safety, documented compliance, and supply chain traceability are procurement priorities:
- RV and marine — house battery systems where deep cycle performance and cell-level safety documentation are required (view RV lithium batteries)
- Solar energy storage — residential and commercial solar battery banks requiring certified components for insurance and project approval (view solar lithium batteries)
- Telecommunications — lithium backup power for remote sites, tower power, and critical communications infrastructure where vendor qualification requires documented cell certification
- Light electric vehicles — golf carts, mobility devices, and other LEV applications where cell-level certification supports broader product approval
- Industrial and OEM — equipment manufacturers embedding lithium batteries into products submitted for broader safety certification
- Trolling motors and marine propulsion — high-discharge applications requiring cells evaluated under sustained electrical stress conditions
- Emergency and backup power — systems where cell-level safety documentation forms part of the procurement compliance package
Across these sectors, procurement specifications and project insurance requirements frequently reference UL evaluation status as an expected credential for lithium battery components.
UL 1642 vs. Other UL Lithium Standards
Buyers frequently encounter multiple UL standard numbers when researching lithium battery certifications. Understanding how they relate helps clarify what each evaluation actually covers and which standards are relevant to a given application.
UL 1642 — Lithium Battery Cells (component level)
Covers individual lithium electrochemical cells. This is the foundational cell-level safety standard and the starting point for broader battery compliance. Applicable to lithium-ion, LiFePO4, lithium metal, and related rechargeable lithium chemistries.
UL 2054 — Household and Commercial Battery Packs
Covers complete battery packs used in household and commercial products. Evaluates the pack as a system rather than at the individual cell level. Often referenced alongside UL 1642 for complete product compliance.
UL 1973 — Stationary and Motive Auxiliary Power Battery Systems
Covers battery systems used in stationary energy storage and light electric rail applications. UL 1973 is particularly relevant for telecom backup infrastructure, stationary energy storage systems, industrial UPS deployments, and commercial ESS installations — where the battery system as a whole, rather than individual cells, is evaluated for the intended application. Canbat holds a separate UL 1973 certification for its 48V telecom and ESS battery systems.
UL 9540A — Thermal Runaway Fire Propagation Testing
UL 9540A is a test method — not a certification standard — that evaluates thermal runaway fire propagation characteristics in energy storage systems. It is commonly referenced in commercial ESS deployments, building permit applications, and fire authority approvals where authorities having jurisdiction (AHJs) require documented thermal propagation data. UL 9540A complements broader system-level lithium battery safety evaluation and is increasingly relevant for large-format commercial installations.
UL 1989 — Valve Regulated and Vented Batteries (lead-acid)
UL 1989 is a completely separate standard covering sealed lead-acid batteries including VRLA and AGM types — not lithium chemistries. Buyers sourcing both lead-acid and lithium batteries should confirm the applicable certification separately for each chemistry.
What to Look for in a UL 1642 Certified Lithium Battery Supplier
Certification status alone does not fully define supplier quality. When evaluating suppliers who claim UL 1642 compliance, consider the following:
- Certificate scope — does the UL 1642 evaluation cover the specific cell models used in the batteries you are sourcing, or only selected models within a broader range?
- Certificate currency — is the certification active and maintained under UL’s Follow-Up Services program? Verify directly through the UL Online Certifications Directory.
- Documentation availability — can the supplier provide the UL 1642 certificate, report reference number, and model coverage scope promptly for procurement or tender submissions? (view Canbat’s UL 1642 Certificate of Compliance)
- Product range depth — a certification covering a broad range of cell models signals a mature compliance program and reduces sourcing risk if requirements change across a project lifecycle.
- Ongoing surveillance — confirm whether the supplier’s cell manufacturing facilities are subject to continued production surveillance under UL’s Follow-Up Services. This is a requirement of maintained certification and a meaningful indicator of production consistency.
Canbat’s UL 1642 Certification
Canbat Technologies holds an active UL 1642 Certificate of Compliance covering lithium battery component models used across its CLI series battery range, continuously maintained under UL’s Follow-Up Services program — including continued production surveillance and ongoing onsite inspections.
Report Ref. MH64971-20210415
Standard UL 1642
Classification Lithium Batteries — Component
Issuer UL Solutions
The certification covers the lithium cells used across Canbat’s CLI series battery range — including cells used in CLI10, CLI12, CLI15, CLI20, CLI22, CLI25, CLI27, CLI30, CLI33, CLI40, CLI50, CLI60, CLI75, CLI100, CLI120, CLI150, CLI200, CLI300, and CLI400 models — evaluated as Lithium Battery Components under UL 1642 requirements.
The certification supports Canbat’s commitment to supplying independently evaluated LiFePO4 lithium batteries for RV, marine, solar, telecom, and industrial applications across North America. The UL 1642 Certificate of Compliance is available for reference in project submittals, procurement documentation, and approved vendor applications. Download Canbat’s UL 1642 Certificate of Compliance.
Need compliance documentation for a project or tender? Canbat can provide the UL 1642 Certificate of Compliance, report reference, and supporting product specifications for covered cell models used in applicable Canbat battery models — promptly and at no charge.
Frequently Asked Questions
What is UL 1642?
UL 1642 is the UL Standard for Safety for Lithium Batteries. It defines the component-level safety requirements for primary and secondary lithium battery cells — including lithium-ion, LiFePO4, and related rechargeable lithium technologies — used as power sources across North American markets. It is a cell-level standard evaluating individual electrochemical cells rather than complete battery packs or systems.
Does UL 1642 apply to LiFePO4 batteries?
Yes. UL 1642 covers primary and secondary lithium battery chemistries, including lithium iron phosphate (LiFePO4), lithium-ion, lithium polymer, and lithium metal. The standard evaluates individual cells regardless of chemistry against a consistent set of electrical, mechanical, thermal, and environmental safety criteria.
What is the difference between UL 1642 and UL 2054?
UL 1642 covers individual lithium cells at the component level. UL 2054 covers complete battery packs for household and commercial use, evaluating the pack as a system. They address different levels of the product hierarchy — UL 1642 at the cell, UL 2054 at the pack. Many battery products require evaluation under both standards depending on the end application.
Is UL 1642 the same as UL 1989?
No. UL 1642 applies to lithium battery cells. UL 1989 is a completely separate standard covering sealed lead-acid batteries with aqueous electrolytes — including VRLA and AGM types. Buyers sourcing both lithium and lead-acid batteries should confirm the applicable certification separately for each chemistry.
How can I verify that a lithium battery’s cells are UL 1642 evaluated?
Certification can be verified through the UL Online Certifications Directory at ul.com. Search by the manufacturer’s company name or certificate number. Only cells actively listed in this directory and covered under UL’s Follow-Up Services should be considered certified. Canbat’s UL 1642 certification can be found under certificate number 20210419-MH64971.
Why does cell-level certification matter for procurement?
Cell-level evaluation establishes the safety baseline at the most fundamental level of the product. UL 1642 evaluated cells have been independently assessed for risks including fire, explosion, leakage, venting, and mechanical failure under defined UL test conditions. This provides procurement teams a verifiable, independent safety credential at the component level — the foundation for any credible lithium battery compliance claim.
What lithium battery models does Canbat’s UL 1642 certification cover?
Canbat’s UL 1642 certification covers the cells used across the CLI series battery range — including cells used in CLI10, CLI12, CLI15, CLI20, CLI22, CLI25, CLI27, CLI30, CLI33, CLI40, CLI50, CLI60, CLI75, CLI100, CLI120, CLI150, CLI200, CLI300, and CLI400 models. Certificate number 20210419-MH64971, actively maintained under UL’s Follow-Up Services program.
