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When exporting lithium-ion batteries to North America, one name appears more frequently than any certification standard: WERCS.Many manufacturers have excellent products and complete UL certificates, yet still get rejected by major retailers at the final step — often because their WERCS registration failed.

What exactly is WERCS?Why do retail giants like Costco, The Home Depot, and Lowe’s rely so heavily on it?And how can you avoid common pitfalls when registering lithium battery products?This article breaks it down completely.

1. What Is WERCS, and Why Is It Mandatory for Retailers?

WERCS is a supply chain compliance platform developed by a U.S. third-party data management company.It does not manufacture products or enforce laws directly; instead, it acts as a compliance data steward between retailers and suppliers.

Why Retailers Adopt WERCS

Top North American retailers (Walmart, Costco, Home Depot, Lowe’s, Target, etc.) work with thousands of suppliers.In-house review of SDS documents, test reports, and insurance policies would be inefficient and high-risk.

WERCS solves this by:

• Unified standards: Retailers delegate compliance review to WERCS for consistent evaluation.
• Centralized data: Suppliers submit documents once for multiple retailers.
• Risk protection: WERCS records serve as critical evidence for liability if safety incidents (e.g., battery fires) occur.

WERCS Is Registration, Not Certification

Important:WERCS does not issue certificates or perform physical product testing.It is a data-review platform that assigns a status:

• Green: Approved for shelf placement
• Yellow: Review required
• Red: Rejected

Without WERCS registration or with a “Red” status, your product is automatically blocked from retail ordering systems.

2. Required Documents for Lithium Battery WERCS Registration

Lithium batteries are classified as Class 9 Dangerous Goods and receive high scrutiny.Prepare these documents before registration:

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3. Full WERCS Registration Process

Step 1: Determine Registration Entity

Registration is usually filed by the brand owner or direct supplier.OEM factories typically provide technical support only.

Step 2: Create a WERCS Account

Register on the official WERCS portal with company details matching retail purchasing systems.

Step 3: Add Product

Select category:Battery, Lithium or Battery-powered DeviceFill in:

• Model, description
• Cell type, capacity, voltage, Wh rating
• UN number (normally UN3480 or UN3481)

Step 4: Upload Documents

Submit UN38.3, UL reports, SDS, etc.The system automatically validates format and data consistency.

Step 5: Select Target Retailers

Choose Costco, Home Depot, Lowe’s, etc.Additional retailer-specific requirements will appear.

Step 6: Pay Fees

Fees apply per model, plus annual renewal fees.

Step 7: Review & Maintenance

Review takes 2–4 weeks.After approval, status becomes Active and retailers can issue orders.

4. Top 5 Reasons WERCS Registration Fails

Based on hundreds of lithium battery cases:

1. Mismatched UN38.3 Information

Manufacturer name, address, or model on the report differs from registration (even punctuation or capitalization).Fix: Keep all information identical.

2. Wrong or Expired UL Standards

Using UL 1642 (cell) instead of UL 2054/2271 (battery pack); or UL certificate is Suspended/Canceled.Fix: Use the correct UL standard for the finished product with active follow-up service.

3. Non-Compliant SDS Format

Chinese, EU-format SDS, or missing Section 14 transport data.Fix: Use professional U.S.-format English SDS with accurate UN details.

4. Undeclared Cell Source

Cell brand/model not listed or cells lack UL 1642 certification.Fix: Fully declare cell supplier and provide UL 1642.

5. Incorrect Packaging Details

Packaging not meeting lithium transport rules (PI 965–970) or wrong weight/dimensions.Fix: Use actual shipping packaging specifications.

5. Retailer-Specific WERCS Tips

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6. Post-Registration Maintenance & Changes

WERCS registration is not one-time.Update promptly if:

• Cell supplier, BMS, or design changes
• Annual renewal is due (30-day grace period before Inactive status)
• UL, insurance, or SDS expire

Retailers conduct third-party shelf audits.Inconsistencies between physical product and WERCS data may result in heavy fines or permanent bans.

7. How We Help You

WERCS registration is complex and error-prone for first-time applicants.As a professional testing and compliance agency, we provide:

• Full WERCS registration 代理 (account setup to final approval)
• Pre-check of UN38.3, UL, SDS to ensure first-pass approval
• Change management consulting to maintain retail compliance
• One-stop global certification: CB, KC (Korea), PSE (Japan), and more

Conclusion

WERCS registration is a mandatory gateway for lithium batteries entering major North American retailers.Many companies fail due to avoidable mistakes.Proper preparation saves time and prevents rejections.

If you need support with WERCS registration or have encountered review issues,contact us for expert lithium battery compliance solutions to get your products on shelves smoothly.