Battery shipping, packaging and warranty
A battery order is not complete when it leaves the line — it is complete when it arrives undamaged, with the right documents, and with a warranty you understand. This page covers the three parts that decide whether a shipment actually delivers its value: classification, packaging, and warranty scope.
Dangerous-goods classification
Lead-acid batteries are not general cargo. The electrolyte is sulfuric acid, so the product is Class 8 corrosive under the [IMO IMDG Code](https://www.imo.org/), which governs sea freight, with the UN numbers themselves set by the [UN Model Regulations](https://unece.org/transport/dangerous-goods). Flooded batteries ship as UN 2794 — Batteries, wet, filled with acid; sealed, non-spillable designs that pass vibration and pressure-differential tests ship as UN 2800 — Batteries, wet, non-spillable. The full logic — including the UN 2800 test requirements and the comparison with lithium's UN 3480/UN 3481 — is in the dangerous-goods classification page.
Packaging and container loading
Batteries are dense, so the loading math works backwards: a standard 20ft container offers about 33 m³ of volume but only about 28,000 kg of payload, and a battery load hits the weight ceiling before the volume. That is why MOQ follows the container (typically 1 × 20ft container (approx. 600–800 units, model dependent)). Packaging has three jobs:
- Terminal protection — prevent short circuits between adjacent batteries.
- Impact protection — keep the case intact through handling and container movement.
- Upright orientation — keep flooded batteries upright so acid stays in the cells.
Pallets are usually kept to about 1.5 m height and 1.5 tonnes for safe stacking, and mixed-model loading spreads unit cost across a full container. The MOQ and lead time page explains the weight logic in detail.
Export documentation
A clean export set avoids delays at customs. The baseline five documents:
- Commercial invoice and packing list
- Bill of lading
- Certificate of origin
- Dangerous-goods declaration (the one amateurs miss)
- Test reports (CCA / capacity) and MSDS where required
Shipping terms follow FOB Tianjin / CFR / CIF, with export from Tianjin / Shanghai. Each document and what it proves is in the export documentation page.
Warranty: read the scope, not just the number
Warranty is 12 months from bill of lading date. But a warranty is only as good as its written scope. Confirm three things before relying on it:
- Duration — from bill of lading date, not from your customer's purchase.
- Exclusions — what is not covered: deep discharge, misuse, physical damage, poor charging.
- Handling — how a claim is filed, inspected and settled, and whether settlement is full replacement or pro-rata.
A “12-month warranty” with broad exclusions is not the same as a 12-month warranty with clear, narrow ones — and a pro-rata settlement is worth less than a full replacement. Get the terms in writing.
The claim-side detail — how a failure is judged, how credit is calculated and how long it takes — is in the warranty claim process page.
Storage: the warranty you lose silently
Packaging and warranty both assume the battery ships soon after production. A battery that sits in a warehouse is still discharging — lead-acid self-discharges at roughly 3–5% per month, and below about 50% charge sulfation begins to harden on the plates. Store cool and fully charged, and top up every 6 months. The storage and shelf life page turns this into a warehouse procedure.
What buyers should ask
- How are batteries packed and loaded — is the container weight-limited or volume-limited?
- Which export documents are provided as standard, and who signs the dangerous-goods declaration?
- What are the exact warranty exclusions and claim handling — full replacement or pro-rata?
- What Incoterm applies, and where does risk transfer?
Where this fits
Dingwei Battery provides OEM and private-label battery programs manufactured by Chengguang Power Tech Co., Ltd. (founded 2002). This page sits inside the logistics and warranty cluster:
- Battery shipping, compliance and warranty: the complete guide
- Lead-acid battery dangerous-goods classification
- Battery export documentation
- Battery warranty claim process
- Battery storage and shelf life
See how lead time and MOQ work in the MOQ and lead time guide, and how to lock terms into an RFQ.
The Author's Take
Position: In my view, a warranty is only as strong as its written scope — a 12-month term with broad exclusions and pro-rata settlement is a very different product from a 12-month full-replacement term.
Reasoning:
- The duration starts at the bill of lading date, not the customer's purchase, which silently shortens the coverage you can resell.
- Exclusions — deep discharge, misuse, physical damage — are where most claims actually die, so they matter more than the headline number.
- Pro-rata settlement is worth less than full replacement, so confirm the handling before you rely on the term.
Disclosure: this is the author's editorial judgment and field experience, not a verified technical claim.
Frequently asked questions
Are lead-acid batteries dangerous goods?
Yes — Class 8 corrosive. Flooded starting batteries ship as UN 2794 (filled with acid) and non-spillable designs as UN 2800, but unlike lithium they need no UN 38.3 test report.
Why does battery MOQ follow the container?
Because batteries are heavy — a 20ft container is capped at about 28,000 kg of payload, and the load hits that weight ceiling before it fills the 33 m³ of volume.
What documents does a battery export need?
5 at minimum — commercial invoice, packing list, bill of lading, certificate of origin and a dangerous-goods declaration — plus test reports and MSDS where the destination requires them.
What does a 12-month warranty actually cover?
Only what the written scope says — duration, exclusions and claim handling. A "12-month warranty" with broad exclusions is not the same as one with clear, narrow ones.
How should batteries be packed for sea freight?
Upright, terminals protected from shorting, on export-grade pallets kept to about 1.5 m height and 1.5 tonnes per pallet, so the load survives handling and customs inspection.
Confirm shipping and warranty terms
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