A battery pack factory in Shenzhen received a large Walmart order last year.All samples passed testing, and pricing was finalized — but they failed at WERCS registration.Without prior registration, goods were stuck at the port for 15 days, missing the selling season and costing $23,000 in port detention fees.

If you are a lithium‑battery manufacturer or supply products containing batteries toWalmart, Costco, The Home Depot, or Amazon US,WERCS registration is a mandatory “invisible threshold” you must cross.It is not a test certification like UL, but it directly determines your listing eligibility.

This guide explains WERCS in plain language: what it is, why you need it, how to register, and how much it costs.

01 What Is WERCS?

WERCS (Worldwide Environmental Regulatory Compliance System)is a product safety and compliance data platform owned by UL.

It is NOT a testing or certification.It is an online compliance database used by major North American retailers.

How it works:

• Suppliers upload product chemical composition, SDS, shipping classification, etc.
• The system automatically evaluates risks in storage, transportation, sales, and disposal.
• A unique WERCS registration number is issued and shared with retailers.

Over 125 major retailers use WERCSmart, including:

• Walmart (mandatory)
• Costco
• The Home Depot
• Amazon US

Without WERCS registration, your battery products cannot enter Walmart’s warehouses.

02 Why Lithium Batteries Must Register

Lithium batteries are classified as dangerous goods, with risks of thermal runaway and fire.Retailers rely on WERCS to verify compliance.

1. Retailer Mandatory Requirement

Walmart requires all products containing chemicals, aerosols, or batteries to complete WERCS assessment before listing.No WERCS number = no item setup = direct removal.

2. Supply Chain Safety

WERCS provides clear handling instructions:storage, transportation, spill response, and emergency procedures.

3. Legal Risk Protection

Incorrect or incomplete information can lead to fines, liability, and lawsuits.The supplier bears full legal responsibility.

03 Three Critical Points for Lithium Battery WERCS

Deadly Mistake 1: Registration Order — “Cell First, Finished Product Later”

For devices with built‑in batteries (power banks, earbuds, etc.):

• First register the cell or battery pack
• Then register the final productWrong order = automatic rejection.

Deadly Mistake 2: UN38.3 Report Is Mandatory

Since June 2019, Walmart and others require:

• Valid UN38.3 test report matching the registered battery pack
• Must include TSD (Test Summary Document)Cell reports cannot be used for battery packs.

Deadly Mistake 3: Retail vs. Non‑Retail Requirements

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04 How to Complete WERCS Registration (4 Steps)

No physical lab testing is needed — 100% online process.

Step 1: Prepare Documents

• UN38.3 test report + TSD (mandatory for lithium batteries)
• English SDS (GHS‑compliant)
• Full chemical composition with CAS numbers (must total 100%)
• Product images, packaging photos, UPC, specifications

Step 2: Create Account & Submit

Register on the WERCSmart portal, select your retailer (e.g. Walmart), and upload all information.

Step 3: System Review

Typical processing time: 48 hours to 7 business days.Incomplete documents will be returned for revision.

Step 4: Receive WERCS Number

Once approved, a WERCS registration number is generated and synced to retailers.You can now ship with confidence.

05 Cost Reference

1. WERCS Platform Fee

Official audit fee: ~$75 per product (varies by type).

2. UN38.3 Test Report

Lithium battery (<100Wh): ~¥3,000 CNY (actual price depends on battery specs).

3. Agency Service Fee

Professional support (SDS, document review, full submission):~¥1,000 CNY per product.

Note:Registration requires updates if formula, components, or regulations change.

Why Choose Us?

Guangdong Energy Storage Testing Technology Co., Ltd. provides one‑stop WERCS solution:

• UN38.3 testing
• Professional GHS SDS compilation
• Full WERCSmart registration service
• Fast approval, zero delays

We help you avoid port detention, fines, and listing failures.
 

Contact Information 

Guangdong Energy Storage Testing Technology Co., Ltd. (ESTL)
Hotline: +86 13925598091
Tel: +86 0769-85075888 ext. 6617
Email: net03@gtggroup.com
Address: 2nd Floor, Area B, Jinshengsheng Industrial Park,Zongbu 2nd Road, Songshan Lake High-Tech Zone,Dongguan, Guangdong, P.R. China