The 5-year paper trail behind every lithium battery pack entry
Clearance is not the finish line. What stays in a lithium battery pack entry file, who owns it, and how to answer a CBP form 28 without a scramble.
Compliance Evidence & Documentation Management
Maintaining the pack's certification dossier, test summaries, and revision control as designs, cells, and suppliers change.
Why Missing Production Records Can Undo a Certification Audit
A test report and a listing prove a design was tested, not what shipped this month. Why production records and change control decide a certification audit.
Your UN 38.3 certificate may not cover the pack you are submitting for PPAP
Before attaching a UN 38.3 test summary or UL listing to a pack PPAP, check the model list, cell model, and configuration against the part you are submitting.
What a Compliance Reviewer Checks in Your Pack Manufacturer's File
A reviewer reads applicant, holder, and covered configuration before accepting any certificate. How to spot a document that doesn't cover your build.
The Audit Finding You Can Avoid by Tracking Battery Safety Certificates One Way
One controlled index that maps every battery certificate and UN 38.3 test summary to the exact pack SKU and revision keeps carrier and customer audits short.
Five Years of Customs Records for Every Battery Pack You Import
What US importers of lithium-ion battery packs must keep after entry, how long, and what to produce when CBP sends a request for information.
Can Your UN 38.3 Test Report Prove Which Cell Lot Shipped in Your Battery Pack?
A UN 38.3 test report covers a cell model, not a shipment. How cell lot codes, work orders, and pack serials hold the compliance evidence chain together.
The certificate-filing habit that quietly fails after your first pack change
Filing certificates by document type breaks at the first pack revision change. How to run compliance evidence as a versioned, indexed, retained document set.
What UN 38.3 and UL Reviewers Expect From Your Cell Lot Records
A UN 38.3 test summary and a UL file are only pointers. Here's the three-record bundle reviewers actually pull: pack serial, cell lot code, end-of-line data.
What Certification Evidence Should Be in a Custom Battery Pack File?
A custom battery pack file needs six evidence types tied to the exact part number, cell model, BMS revision, and site — plus a register that stays current.