Short answer: a production-ready power bank specification identifies the exact SKU and revision, target market, cell configuration, port profiles, simultaneous-use behaviour, protection limits, construction, artwork, packaging and compliance evidence. It also defines how each requirement will be tested and accepted. Replace phrases such as “high quality,” “fast charging” and “same as sample” with a value, tolerance, test condition or controlled reference.
The specification becomes the technical baseline shared by the buyer, factory, test laboratory and inspector. It should match the approved sample, purchase order, artwork and compliance file. If those records disagree, production can follow the wrong cell, port profile, label or package even when every party believes it has followed the order.
The workflow below helps importers, private-label brands and sourcing teams turn an accepted quotation into controlled OEM or ODM production instructions. A section-by-section checklist and copy-ready specification template are included.
What is a power bank product specification?
A power bank product specification is the controlled document that defines what the supplier must build and how conformity will be checked. It records the product configuration, measurable performance, approved materials, appearance, artwork, packaging, evidence and acceptance rules for one SKU or a clearly defined group of variants.
A catalogue page may describe a product family or its maximum feature set. The production specification has a narrower job: identify the version being ordered and settle options such as capacity, cell, cable direction, colour, wireless function, packaging language and market documentation.
| Document | Main purpose | What it should control |
|---|---|---|
| RFQ | Obtain comparable proposals and prices | Requested scope, quantities, assumptions and supplier response |
| Product specification | Define the product to be manufactured | Configuration, measurable requirements, tolerances and controlled references |
| Approved golden sample | Provide a physical production reference | Approved appearance and the verified configuration linked to the specification |
| Purchase order | Place the commercial order | SKU, quantity, price, delivery and referenced document revisions |
| Quality or inspection plan | Define production and release checks | Test stages, sampling, defect classes, records and failed-lot action |
| Test report | Record evidence from a defined evaluation | Sample identity, method, equipment, conditions, results and decision |
Begin with a detailed power bank RFQ. After a model is selected, move accepted requirements into the controlled product specification rather than leaving them across quotations, chat messages and artwork emails.
A practical power bank specification checklist
| Section | Minimum information to record | Evidence or reference |
|---|---|---|
| 1. Document control | Title, buyer SKU, factory model, revision, date, status and approvals | Revision history and signed approval |
| 2. Market and use | Destination countries, sales channel, intended use and exclusions | Market-specific compliance plan |
| 3. Battery | Cell maker/model, configuration, nominal voltage, mAh, Wh and traceability | Cell specification and production lot record |
| 4. Wired interfaces | Direction, voltage/current profiles, maximum power and supplied cable | Protocol-analyser and load-test record |
| 5. Operating logic | Shared output, pass-through, low-current mode, display and shut-off behaviour | Mode matrix and firmware revision |
| 6. Wireless functions | Required mode, alignment, magnets, case conditions and simultaneous use | Test-device list and certification status where required |
| 7. Safety and reliability | Protection functions, temperature method, durability and ageing requirements | Defined tests and pass/fail limits |
| 8. Mechanical design | Dimensions, weight, materials, finish, colour and tolerances | Controlled drawing and physical colour reference |
| 9. Artwork and packaging | Logo, rating label, manual, retail box, barcode and carton revisions | Approved files and packed sample |
| 10. Compliance and transport | Applicable evidence, model coverage, responsible party and shipping records | Report, certificate, declaration and test-summary references |
| 11. Acceptance | Test methods, sample sizes, limits, defect classes and rejection action | Quality plan and inspection checklist |
| 12. Change control | Controlled parts and changes requiring notice, validation or reapproval | BOM revision and engineering change record |
The document should match the project. A standard model with a logo may need only a compact specification and controlled artwork. A custom enclosure, PCBA, firmware or wireless system will need drawings, interface tables and a validation plan. In either case, a qualified reader should be able to determine what to build and how to judge it.
1. Control the document identity and revision
Put a document-control block on the first page. Record the specification title, buyer company, supplier, buyer SKU, factory model, capacity and colour variant, revision, issue date and approval status. Name the people authorised to approve changes.
- Document number and revision
- Buyer SKU and factory model number
- Variant or configuration code
- Prepared, reviewed and approved by
- Issue date and effective purchase orders
- Status: draft, sample review, approved for production or obsolete
- Revision history with a short description of each change
Do not overwrite a released specification without changing the revision. Mark obsolete files clearly and remove them from purchasing, production and inspection folders. The purchase order should reference the approved revision so that a later update does not silently change an existing order.
2. Define the SKU, target market and variant matrix
State where and how the product will be sold. Marché cible affects markings, language, documentation, packaging and the responsibilities of the importer or other economic operator. A specification for a US promotional product should not automatically be reused for an EU retail SKU.
- Destination country or region
- Sales channel and intended users
- Brand owner, importer or responsible economic operator when known
- Included product, cable, accessories and package contents
- Excluded or prohibited functions and claims
- Operating and storage conditions relevant to the project
If one housing is sold in several capacities, colours or cable versions, use a variant matrix. Give each sellable configuration its own SKU and list which fields may differ. Do not use one approval record for 5,000mAh and 10,000mAh versions unless the battery, ratings, weight, labels and compliance evidence for both are identified.
| Variant field | SKU A | SKU B | Control question |
|---|---|---|---|
| Nominal capacity and Wh | To be completed | To be completed | Do the cell configuration and label match? |
| Housing colour | To be completed | To be completed | Is there an approved physical colour reference? |
| Built-in cable | To be completed | To be completed | Are direction and protocol support defined? |
| Artwork language | To be completed | To be completed | Are label, manual and box revisions aligned? |
| Compliance file | To be completed | To be completed | Does the evidence cover this exact version? |
3. Specify the battery cell, capacity and energy
Do not define the battery with mAh alone. Record the cell maker, model, chemistry, format, quantity, series/parallel configuration, nominal voltage, rated capacity and calculated watt-hours. State whether the capacity value is minimum, rated or typical, and keep the same basis across the product, label and test records.
- Approved cell manufacturer and exact cell model
- Chemistry, format and cell configuration
- Nominal voltage, rated capacity in mAh and energy in Wh
- Minimum cell capacity where contractually required
- Date-code, lot-code and storage-age limits
- Incoming inspection and lot-traceability requirements
- Cycle-life test method, checkpoints and end-of-life threshold when required
- Rules for alternate cells or substitutions
Nominal battery energy and usable output energy are not the same result. If usable energy matters, define the output port, voltage, load, starting state, cut-off condition, temperature range, sample count and calculation method. Keep the raw discharge curve or meter log with the test report. The power bank battery-cell selection guide explains capacity, cycle life and traceability in more detail.
4. Write a profile table for every port and cable
The connector name alone says little about its power behaviour. For each USB-C port, USB-A port and built-in cable, state whether it is an input, output or bidirectional interface. List the required fixed voltage/current profiles, PPS range where applicable, maximum power, protocol scope and test condition.
| Interface | Direction | Required profiles | Maximum power | Evidence |
|---|---|---|---|---|
| USB-C1 | Input / output / both | List fixed PDOs and PPS APDO range if required | Enter separately for input and output | Protocol capture and sustained-load result |
| USB-A1 | Output | List required modes and voltage/current combinations | Enter value | Protocol and load result |
| Built-in USB-C cable | Input / output / both | List required profiles | Enter value | Protocol capture, voltage-drop and durability record |
| Supplied detachable cable | Accessory | Connector, length and required current/power rating | Enter value | Cable identification and test result |
USB Power Delivery behaviour should be checked from protocol negotiation as well as voltage and current at the output. The USB-IF document library publishes the current USB Power Delivery and USB Type-C specifications. Do not treat the shape of a USB-C connector as proof of PD, PPS, bidirectional charging or a specific wattage.
Use the separate USB-C PD power bank specification guide for profiles, PPS, shared output and cable verification. For an integrated connector, also define cable length, conductor requirement, storage method, strain relief, insertion or bending method and the acceptance condition covered in the built-in-cable power bank guide.
5. Define shared output, charging logic and firmware behaviour
A headline wattage normally describes one operating condition. Multi-port products need a mode matrix showing what happens when interfaces are used together. Record total shared power, port allocation, priority, fallback profiles and any output that becomes unavailable.
- Each input and output used alone
- Every required two-port and multi-port combination
- Total shared output and allocation by port
- Fast-charge renegotiation when another device is connected
- Pass-through input/output combinations and limitations
- Low-current mode activation, duration and exit behaviour
- Automatic start and shut-off thresholds
- Button, LED, display and state-of-charge behaviour
- Firmware or controller revision used for approval
For a TFT or numeric display, define the fields shown, units, update behaviour and the permitted difference between the display and the agreed reference measurement. “Accurate display” is incomplete without a method and tolerance. If firmware can be updated, state who may release a new version and which checks must be repeated.
6. Specify wireless charging and magnetic features separately
Wireless power, magnetic alignment and wired power are separate requirements. Record the required wireless mode, input conditions, compatible receiver or test device, case condition, coil location, alignment tolerance, foreign-object behaviour, magnet layout and simultaneous-use rules.
- Required Qi or Qi2 status, if part of the project
- Exact certification listing matched to the model where certification is claimed
- Wireless power mode and input supply condition
- Approved receiver devices or test fixtures
- Coil centre, charging area and allowable misalignment
- Case material and maximum case thickness included in compatibility tests
- Magnet arrangement and project-specific holding-force method
- Temperature measurement locations and operating duration
- Wired and wireless simultaneous-use behaviour
The Wireless Power Consortium publishes the Qi specifications and a certified-product database. A phrase such as “magnetic wireless charging” does not establish Qi certification, device compatibility, charging power or holding force. State each claim and its evidence separately.
7. Convert safety and reliability expectations into tests
List the protection functions required for the selected design, such as overcharge, over-discharge, overcurrent, short-circuit and over-temperature behaviour. Then reference a test method, sample condition and pass/fail rule. Do not assume that a controller datasheet proves how the finished power bank behaves.
Temperature limits require the same discipline. State the ambient condition, charger, cable, input or output mode, load, operating duration, measurement location and limit. A surface-temperature result and an internal component-temperature result answer different questions. The project team should set appropriate limits from the design, applicable standards, target market and intended use.
- Electrical protection test and recovery behaviour
- Maximum-load and extended-operation temperature test
- Charge/discharge cycling where a life target is claimed
- Drop, vibration or impact checks relevant to normal use and transport
- Connector insertion, cable bending, cable pull or retraction-cycle checks
- Button, display, hinge, stand or plug-cycle requirements
- Ageing or burn-in condition for production where agreed
- Acceptance limits and disposition after a failure
Buyer-side verification does not replace formal safety or transport testing. IEC 62133-2 addresses safety requirements and tests for portable sealed secondary lithium cells and batteries, while UN Manual of Tests and Criteria subsection 38.3 addresses transport testing for lithium cells and batteries. Determine applicability for the exact product and market rather than copying a generic list of test names.
8. Control dimensions, materials, colour and workmanship
Attach a controlled drawing for length, width, thickness, port positions, button location, logo area and any assembly gaps that matter. Record finished-product tolerances rather than nominal dimensions alone. Include maximum weight when freight, portability or a product claim depends on it.
- Overall dimensions and tolerances
- Finished weight and tolerance
- Housing, lens, cable, magnet and metal-part materials
- Surface texture, coating, printing and gloss requirements
- Physical colour standard and viewing condition
- Logo position, size, method and colour
- Gap, step, scratch, dent, contamination and print-defect limits
- Approved appearance sample and reference photographs
Separate measurable drawing limits from visual workmanship criteria. A Pantone reference on a PDF may guide colour matching, but the buyer should approve a physical colour sample when batch-to-batch appearance matters. Photographs help an inspector identify a defect location; they do not reliably control colour by themselves.
9. Link every artwork and packaging file to the specification
List each approved file by name, revision and date. The product rating label, retail box, manual, barcode label and master carton should show the same model, capacity, watt-hours and electrical ratings as the product specification. Resolve differences before printing or production release.
| Controlled item | Fields to verify | Approval reference |
|---|---|---|
| Product rating label | Model, capacity, Wh, input, output, marks and responsible-party information | Filename, revision, date and physical sample |
| Retail box | SKU, product claims, ratings, contents, languages and barcode | Artwork PDF and packed sample |
| User manual | Port functions, operating instructions, warnings and technical data | Language-specific file revision |
| Accessories | Cable, pouch, insert or other included item | Part number and approved sample |
| Master carton | Quantity, model, weights, dimensions, lot code and transport marks | Carton artwork and packing record |
Utilisez le power bank label, packaging and manual checklist to review the information across these records. Keep retail packaging requirements separate from lithium-battery transport packaging and marks.
10. Build a model-specific compliance and transport file
Use the product specification to identify the required compliance outcome, then link it to a separate matrix or evidence register. For each report, certificate, declaration or transport document, record the exact model and tested configuration, issuing body, reference number, date and document owner.
- Destination market and applicable product category
- Exact product, cell, PCBA and wireless configuration covered
- Report, certificate, declaration or registration reference
- Applicant, manufacturer, importer or other responsible party
- Laboratory or issuing body and issue date
- Artwork marks and claims supported by the evidence
- Changes that trigger an applicability review or retest
- UN 38.3 test summary and route-specific shipping records
There is no single certificate that clears every power bank for every destination. The power bank certification guide explains model and market matching. For logistics, use the separate power bank shipping document checklist and confirm the actual route with the carrier or dangerous-goods forwarder.
For an EU project, review the current consolidated text of Regulation (EU) 2023/1542 and other legislation applicable to the complete product. Do not copy a label date or obligation from an old checklist without checking whether implementing acts, transitional dates or later amendments affect the SKU.
11. Define test methods and acceptance criteria
Both parties need to know how a requirement will be evaluated. For every critical performance claim, record the test equipment or method, sample state, input condition, load, duration, measurement point, sample size, tolerance and pass/fail rule.
| Weak wording | Manufacturing-ready approach |
|---|---|
| 10,000mAh high-quality battery | Name the cell and configuration; state nominal voltage, rated/minimum capacity basis, Wh, incoming checks and traceability. |
| 22.5W fast charging | Identify the interface, direction, required voltage/current profiles, sustained duration, test equipment and tolerance. |
| Supports multiple devices | Provide a simultaneous-output matrix with total power, allocation, priority and fallback behaviour. |
| Low temperature | Define ambient condition, mode, load, duration, measurement locations and maximum limits. |
| Strong built-in cable | Define cable construction plus bend, pull, insertion or retraction method, cycles, sample size and failure criteria. |
| Colour same as sample | Identify the sealed colour sample, material, finish, approved range and viewing condition. |
| AQL inspection required | Name the sampling standard and edition, lot definition, inspection level/state, AQL values by defect class, sample plan and rejection action. |
Utilisez le 15-point power bank quality-testing checklist to select electrical and construction checks. For pre-shipment inspection, the specification should work together with defect examples and the AQL sampling and QC checklist.
ISO 2859-1:2026 provides AQL-indexed sampling schemes for lot-by-lot inspection by attributes. Merely writing “AQL 2.5” is incomplete. The inspection document should also identify the standard edition, lot, inspection level, inspection state, defect classification and acceptance/rejection numbers. AQL sampling is a lot-disposition tool; it does not guarantee that the shipment contains exactly the stated percentage of defects.
12. Freeze controlled components and engineering changes
Attach an approved BOM when it is available, or create a controlled-component list when the supplier will not disclose the complete BOM. At minimum, identify parts whose substitution can change safety, capacity, charging behaviour, compatibility, appearance or compliance evidence.
- Battery cell maker and model
- PCBA and charging-controller revision
- Protection components and firmware
- USB ports, built-in cable and detachable cable
- Wireless module, coil, magnets and thermal materials
- Enclosure resin, metal parts, adhesive and coating
- Display, indicator and mechanical accessories
- Labels, manual, packaging and production site
Define which changes are prohibited, pre-approved or subject to written notice and buyer approval. A proposed change record should identify the old and new part, reason, affected lots, performance and compliance impact, validation evidence, sample requirement and implementation date. Silence should not become approval unless the parties deliberately agree to that process.
Put the change obligation in the power bank OEM manufacturing agreement as well as the technical specification. The contract controls the obligation and remedies; the specification identifies the technical baseline that must not change.
How to approve and release the specification
Do not release production from an unstructured email thread. Review one controlled package containing the specification, drawing, BOM or controlled-component list, artwork, packaging files, test record, compliance matrix and approved sample ID.
- Consolidate requirements. Move accepted quotation details and engineering decisions into one draft.
- Resolve contradictions. Compare the draft with the sample, label, manual, box, reports and purchase order.
- Test the intended configuration. Record the cell, PCBA, firmware, ports, cables and accessories used.
- Close open issues. Give each deviation an owner, due date and required evidence.
- Approve matching references. Sign the specification and identify at least two matching golden samples where practical.
- Reference the release. Put the specification revision and sample ID on the purchase order and inspection instruction.
- Control later changes. Update the revision and repeat affected reviews before implementation.
Le power bank sample approval checklist explains how to create the golden-sample record. A sample is evidence for the specification; it should not replace written limits for internal components or measured performance.
Copy-ready power bank product specification template
Use the template as a working outline, then add the drawings, tables and test methods for the selected model. Engineering, quality and compliance owners should review the fields that fall within their responsibility.
POWER BANK PRODUCT SPECIFICATION DOCUMENT CONTROL Buyer company: Supplier / manufacturing site: Document number: Revision and date: Status: Buyer SKU: Factory model: Prepared / reviewed / approved by: Applicable purchase order(s): PROJECT AND MARKET Project route: private label / configured OEM / ODM Destination market(s): Sales channel and intended use: Importer / responsible economic operator: Included product and accessories: Excluded functions or claims: PRODUCT IDENTITY Variant / colour / capacity code: Product dimensions and tolerances: Finished weight and tolerance: Housing and structural materials: Surface finish and physical colour reference: Controlled drawing number and revision: BATTERY Cell maker and exact model: Chemistry and format: Cell quantity and configuration: Nominal voltage: Rated / minimum capacity basis: Nominal capacity (mAh): Nominal energy (Wh): Cell date-code and lot rule: Incoming inspection and traceability: Approved alternate cells: Cycle-life method and acceptance limit, if required: WIRED INPUTS, OUTPUTS AND CABLES Interface name and connector: Input / output / bidirectional: Required fixed voltage/current profiles: Required PPS range, if applicable: Maximum input and output power: Supplied cable part number, length and rating: Built-in cable construction and durability method: Protocol-capture and sustained-load method: OPERATING MODE MATRIX Single-port behaviour: Two-port / multi-port allocation: Pass-through behaviour: Low-current mode: Automatic start and shut-off: Button / LED / display behaviour: Firmware or controller revision: WIRELESS AND MAGNETIC FUNCTIONS Required wireless mode / certification status: Input condition and test receiver(s): Coil location and alignment tolerance: Magnet layout and holding-force method: Case compatibility condition: Wired + wireless simultaneous-use behaviour: Thermal method and limits: PROTECTION AND RELIABILITY Overcharge / over-discharge test: Overcurrent / short-circuit test: Over-temperature behaviour: Maximum-load thermal test: Drop / vibration / mechanical tests: Connector / button / stand / plug cycle tests: Production ageing or burn-in requirement: APPEARANCE AND WORKMANSHIP Logo method, size, colour and position: Gap / step limits: Scratch, dent and contamination limits: Printing and colour defect criteria: Approved appearance sample ID: Reference photo file: ARTWORK AND PACKAGING Product rating-label file and revision: Retail-box file and revision: Manual language, file and revision: Barcode / QR / serial / lot-code rule: Included accessories: Units per inner and master carton: Carton dimensions and maximum gross weight: Carton artwork and transport-mark revision: COMPLIANCE AND TRANSPORT FILE Target-market compliance matrix: Required report / certificate / declaration references: Exact models and configurations covered: UN 38.3 test-summary reference: Battery / product safety evidence: Shipping document responsibility: Changes requiring applicability review or retest: QUALITY AND ACCEPTANCE Test-method document and revision: Sample size for each performance test: Measurement equipment and conditions: Performance tolerances and pass/fail limits: Inspection standard and edition: Lot definition and inspection level/state: Critical / major / minor defect definitions: AQL values and acceptance/rejection numbers: Failed-lot, rework and reinspection process: Required inspection and test records: CONFIGURATION AND CHANGE CONTROL Approved BOM revision: Controlled-component list: Approved PCBA and firmware revisions: Prohibited / pre-approved alternatives: Engineering change notice process: Sample, validation and reapproval triggers: PRODUCTION RELEASE Golden sample ID(s): Approved test-report reference: Approved artwork package: Approved compliance file: Open issues and conditions: Buyer approval / date: Supplier approval / date: REVISION HISTORY Revision / date / description / approver:
Common power bank specification mistakes
- Copying a catalogue page and calling it the production specification
- Writing only mAh without nominal voltage, Wh, cell identity or capacity basis
- Using “USB-C PD” without profiles, PPS range, direction and test evidence
- Publishing the sum of port maximums as if it were simultaneous output
- Approving a housing sample before the final cell, PCBA or firmware is installed
- Letting the label, manual and retail box show different ratings
- Listing certificate abbreviations without matching reports to the exact SKU
- Writing “AQL inspection” without defect classes, sampling details or rejection action
- Allowing equivalent components without a defined change and validation process
- Keeping final decisions only in messages instead of issuing a new revision
Questions fréquentes
What should be included in a power bank product specification?
Include document identity, exact SKU, market, cell and battery energy, port profiles, shared-output behaviour, firmware, wireless functions, protection and reliability tests, dimensions, materials, artwork, packaging, compliance references, acceptance criteria, controlled components and change rules.
Is a supplier datasheet enough for an OEM order?
Usually not. A supplier datasheet may describe a model family or typical values. An OEM specification should identify the ordered variant, approved components, tolerances, artwork, packaging, test methods and production-change rules.
Who should prepare the power bank specification?
The factory normally provides model and engineering data, while the buyer defines market, branding, commercial acceptance and any customer-specific requirements. Engineering, quality, compliance and purchasing should review the fields they own. Both buyer and supplier should approve the released revision.
Does the golden sample replace the written specification?
No. The golden sample is a physical reference, but it does not expose every internal part or define test tolerances. Link the sample ID to the written specification, BOM or controlled-component list, artwork and test report.
Should every colour or capacity have a separate SKU?
Each sellable configuration should be unambiguous. Separate SKUs are appropriate when capacity, cell, colour, cable, artwork, market or package changes. A controlled variant matrix can share common requirements while identifying every permitted difference.
Can the factory change a battery cell after specification approval?
Only under the agreed change-control process. The proposed cell should be identified and reviewed for capacity, electrical performance, reliability, traceability, safety and compliance impact. The buyer may require samples, repeat testing and written approval before implementation.
When should the specification be frozen?
Release the production revision after the intended configuration, critical performance, artwork and required evidence have been approved. Material purchasing or production started earlier should be treated as a documented risk, not as automatic acceptance of unfinished requirements.
How often should a power bank specification be updated?
Update it whenever an approved requirement, component, drawing, firmware, test method, artwork, packaging file or compliance basis changes. Issue a new revision, record the reason and identify which purchase orders and production lots use it.
Sources officielles de référence
- USB-IF document library: USB Power Delivery specifications and test documents
- Wireless Power Consortium: Qi specifications and certified-product resources
- IEC 62133-2:2017 with Amendment 1:2021: portable lithium cell and battery safety
- UNECE: UN Manual of Tests and Criteria, Revision 8 and Amendment 1
- ISO 2859-1:2026: AQL-indexed sampling schemes for lot-by-lot inspection
- EUR-Lex: Regulation (EU) 2023/1542 concerning batteries and waste batteries
- IATA Guidance Document for Lithium Batteries and Sodium Ion Batteries for the 2026 Regulations
Standards, regulations, test programmes and transport instructions change. Confirm the current edition, applicability and effective dates for the exact product, destination and shipment before approving production.
Prepare the selected power bank for controlled production
When contacting YULIDA, provide the selected model, order quantity, target market, charging functions, branding files, packaging scope and buyer test requirements. These details allow the factory to return the relevant model data, sample information and production references for the specification package.
Review the power bank OEM/ODM service scope or Contacter YULIDA about a 500, 1,000 or 2,000-piece project. Final MOQ, specification scope, sample route, documentation and lead time depend on the selected platform and requested changes.
Sources officielles et vérification
Ces sources primaires étayent les informations de cet article sur les normes, la compatibilité, la sécurité ou le transport. Vérifiez les exigences actuelles pour le modèle précis et le marché de destination.
- USB Implementers Forum — USB Type-C and USB Power Delivery specifications and guidance.
- Wireless Power Consortium — Normes Qi et Qi2, certification et informations sur la recharge sans fil.
- Commission électrotechnique internationale — Normes électrotechniques internationales et leurs domaines d’application.
- International Air Transport Association — Lithium-battery transport requirements and industry guidance.
