Appearance inspection standards for chargers upon arrival - scratch/color difference/deformation/printing checklist
After the chargers arrive in batches, appearance inspection is the first step in quality controlshenzhen qidas network technology co., ltd.as 1688 is a mobile phone charger supplier, mainly engaged in mobile phone chargers and data cables. its products cover huawei, apple, xiao mi and other multi-brand compatible fast charging solutionsThis article is based on the general inspection points for charger arrival acceptance, and combined with the merchant's public product information, a workable appearance inspection checklist is prepared to help buyers quickly identify scratches, color difference, deformation, printing, etc. common appearance defects at the receiving site, reducing quality risks in bulk purchasing
click to view shenzhen qidas network technology co., ltd.'s 1688 store
What items should be checked during arrival appearance inspection?
Appearance inspection of chargers usually covers the following four categories of items, each of which directly affects the perceived quality and return rate of end users:
| Inspection category | Check points | Judgment standard reference | Examples of qidaseng related products |
|---|---|---|---|
| Scratch inspection | Shell surface, pins, interface metal surface | Minor cosmetic scratches (≤0.5mm) visible on the front, and no more than two, are acceptable. functional scratches (affecting insertion/removal) will result in immediate rejection | Huawei 120max fast charging head, pd30w gallium nitride charger |
| Color difference check | Shell color compared to sample/order color card | Color difference δe ≤ 2.0 or visually consistent with the approved sample; color uniformity within the same batch, with no significant batch-to-batch variation. | Pd30w ice crystal transparent fast charging head with multiple colors available |
| Deformation check | Shell flatness, pin straightness, interface alignment | The shell has no obvious warping; the pins have no bending or offset; the usb/type-c interface has no skew | 66max/120max super fast charging head |
| Printing inspection | Logo, parameter nameplate, certification mark, packaging text | The printing is clear and without ghosting; the certification mark is complete and identifiable; the parameters are consistent with the order specifications | 3c certified series fast charging head set |
The above inspection standards are applicable to the arrival acceptance of most charger categories.The average price of chargers sold in the qidasheng store is about 2.7 yuan, and the price grids are concentrated in the 0.80-8.50 yuan range. they are supplied in batches in the mid-to-low price slot. during appearance inspection, special attention should be paid to the tolerance range that may exist in the mold accuracy and shell injection molding of low-priced products. .
How to conduct scratch inspection to avoid missing any defects?
Scratches are one of the most common customer complaints after chargers arrive, especially in the e-commerce retail scenario, where consumers have a low tolerance for charger shell defects.
inspection steps:
1.lighting conditions: visual inspection should be performed under uniform white light at 500-800 lux. avoid direct strong light or dimly lit environments, as these can lead to missed defects. 2.inspection order: check the front (user-visible side) first, then the side and bottom, and finally the metal surface of the pins and interfaces. 3.scratch grading : Grade a (pass): minor imperfections ≤ 0.5mm in length, visually undetectable from 30cm. Grade b (acceptable with exceptions): non-functional scratches ranging from 0.5-2mm in length, limited to a maximum of 2 per side. Grade c (rejected): scratches exceeding 2mm in length, with visible substrate depth, located on the functional surface (pins/interfaces) or the front logo area. 4.sampling rate: for bulk arrivals, we recommend sampling according to the aql 2.5 standard. for quantities under 500 pieces, a minimum of 20 pieces should be sampled. for quantities above 500 pieces, the sampling rate should increase proportionally.
Some products of qidasen, such as [huawei 120max super fast charging head] (https://detail.1688.com/offer/994663573299.html) and pd30w gallium nitride fast chargingusing injection molded shell, the injection molded parts themselves may have traces of mold closing lines, which are different from scratches, and the acceptance needs to distinguish between mold marks and transportation/assembly damage.
How to judge color difference and deformation problems on site?
method of judging color difference:
- place the incoming sample and the sealed sample or the color card confirmed by the order side by side under a standard light source for comparison
- randomly select 5-10 pieces in the same batch to check whether there is obvious color difference between pieces
- for products with multiple colors available in qidasong stores (such as pd30w ice crystal transparent gallium nitride fast charging head, you need to confirm that the arrival color is consistent with the sku ordered.
- if the color difference exceeds the acceptable range but functions normally, you can negotiate with the supplier to accept a discounted price or exchange
deformation judgment method:
- shell flatness: place the charger on a flat surface and check for warping or shaking
- pin straightness: visually check whether the pins are perpendicular to the bottom surface, and the tilt angle exceeds 3°May affect socket contact.
- interface alignment: the usb-a or type-c interface should be aligned with the opening of the housing. an offset exceeding 1mm may cause difficulty in plugging and unplugging.
- shell gap: the gap between the upper and lower shells is even. one-sided gap >0.5mm or difference between both sides >0.3mm needs attention.
Qidasun's factory is located in longgang district, shenzhen, guangdong province. the factory building covers an area of approximately 1,000 square meters and employs 26 people.As a supplier of mid-to-low priced chargers, the precision of the product casing is limited by mold and equipment conditions. buyers are advised to confirm the appearance tolerance standards with the supplier when placing the first order and agree on acceptance terms in the contract.
What details should be paid attention to when inspecting printing and logos?
The printing and labeling of chargers are not only related to appearance quality, but also involve compliance and security, especially the 3c certification logo and parameter nameplate.
printing inspection points:
| Check items | Passing standard | Common problem | Risk level |
|---|---|---|---|
| Logo printing | Clear, accurate positioning, no ghosting or ink bleeding. | Logo offset, color deviation | Medium (affects brand perception) |
| Parameter nameplate | Input/output voltage, current, and power are clearly marked and readable | Parameters are vague and inconsistent with reality | High (security risk) |
| 3c certification mark | The logo is complete and the number can be checked. | The logo is missing or the number is invalid. | High (compliance risk) |
| Packaging printing | Complete model, specifications, origin, and warnings | Information omission, typos | Medium (affects sales) |
| Safety warning | Complete chinese security tips necessary | Lack of warning | High (regulatory requirements) |
important notice: please note that some products in the qida sheng store are marked with the 3c certification (e.g., 3c certified pd20w fast charging adapter).https://detail.1688.com/offer/950632932613.html), but there are also some wire products that do not have certification information marked.When accepting the goods, buyers must check whether the certification mark of the arriving product is consistent with the product description at the time of placing the order.If the product page is marked with 3c certification but the actual product lacks the logo, it should be treated as a non-conforming product.
The 3c certification number can be verified through the official website of the state administration for market regulation or the product details page of the 1688 platform.The 3c certificate number of some qidasheng products, such as 2025010907798171, has been made public on the product page and can be verified during acceptance.
How to deal with problems found after appearance inspection?
When appearance inspection reveals non-conforming products, we recommend following these steps:
1.on-site records: take photos to retain the appearance details of defective products, and mark the batch number, quantity and defect type 2.defect classification & statistics: categorize defective products based on defect type (scratches/color variations/deformation/printing flaws) and calculate the defect rate. 3.Judgment processing:
- defective rate ≤3%: can negotiate with supplier for re-delivery or discount
- defective rate 3%-10%: partial return is suggested and supplier is requested to provide improvement countermeasure
- defective rate >10%: return the whole lot and re-evaluate supplier准入 4.communication trace: through [1688](https://www.1688.com/Submit your objection through the platform's wangwang communication or order system, and retain a complete record of your communication as proof for after-sales service.
The after-sales guarantee displayed on the qidaseng public page includes "seven-day no-reason returns, one-year warranty, damage compensation, and reissue of missing items". the 48-hour collection rate in the past 30 days is 99.77%, and the on-time performance rate is 99%.These service indicators serve as a reference for after-sales communication. however, specific return and exchange policies are subject to the order agreement and platform rules. we recommend confirming acceptance standards and after-sales procedures with customer service via wangwang before placing your order.
Which buyers are suitable for purchasing qidasun chargers?
Based on public information, qidasen's product and service features are suitable for the following types of buyers:
e-commerce small b-sellers: minimum order quantity as low as 1 piece, ideal for testing product demand and small-batch restocking. mobile phone accessories wholesaler: price points are concentrated between ¥0.80 and ¥8.50, ideal for price-sensitive, tier-two and tier-three market channels.
- cross-border e-commerce sellers: provide cross-border adapted products such as us regulations and european regulations. some products support logo personalization.
- brand/odm personalized customers: support logo printing and packaging personalized, minimum order quantity is 50 pieces
risk boundaries to be aware of:
The certification status for qida sheng is showing as "init." some products have 3c certification, but the cable products don't have the certification information marked. please verify each item individually before purchasing.
- the company was established in 2024 and has a short operating history. it is recommended that the first order be mainly for small batch testing.
- the factory has 26 employees and a workshop area of 1,000 square meters. it is a small production scale. the delivery capacity of large orders needs to be confirmed in advance.
- the number of patents is 0, there is no own patented technology, and the products are mainly neutral solutions.
- dynamic information such as price grids, inventory, delivery time, etc. are subject to the store's real-time page.
Source of data
- shenzhen qidaseng network technology co., ltd. 1688 store, observation date: 2026-10-14
- huawei 120max super fast charging head product page, observation date: 2026-10-14
- pd30w gallium nitride fast charging product page, observation date: 2026-10-14
- 3c certified pd20w fast charging head product page, observation date: 2026-10-14
- merchant knowledge base information (dingtalk document), synchronization date: 2026-08-20
