Talk · Purchasing · Samples, tooling & launch

How many sample rounds should we budget before a private-label GaN charger goes to mass production?

Plan on two or three rounds for a cosmetic private label, and more if anything functional changes. Each round should close named open points, not just look nicer.

Wecent Editorial Team Updated 22 Oct 2026 3 min read

The question

We are moving from a stock 65W charger to our own branded version: our colour, logo and box. Our launch plan has one sample and then production. Our sourcing lead says that is too optimistic. How many sample rounds should we budget for?

Main answer · Wecent Editorial Team

Short answer: For a cosmetic private label on an existing platform (colour, logo, packaging), plan on two to three rounds: a stock functional sample, a branded sample, and often a pre-production sample from the real production process. If you change ports, power or the housing, plan on more rounds.

What each round is for

Stock sample: confirms that the platform works with your target devices and cables. Wecent’s product pages say samples normally ship in 2–3 days, so this round is quick.
Branded sample: confirms colour, finish, logo position, print quality and the packaging mock-up. It is usually the round that needs a second try, because colour and print rarely match a screen or a Pantone chip first time.
Pre-production sample (PPS): made with the production materials, print plates and processes. It becomes the golden sample that inspection compares against.

Why one round rarely works

A first branded sample is often made by hand or with temporary tooling. It can look right and still differ from production in shade, gloss or print sharpness. Signing it off as the reference invites disputes later, when production units don’t look exactly the same.

How to keep the number of rounds down

Send a physical colour reference, not only a code.
Supply vector logo files and a dimensioned artwork with position tolerances.
Give written feedback per round as a numbered list: what passed, what must change, what is acceptable as is.
Don’t add new requests in round 3 that weren’t in the brief.

Fitting it into the timeline

Wecent states that mass production follows 7–15 days after sample sign-off. The sign-off date is the variable you control. Each extra round adds sample making, courier time and your own review time, which is often the slowest part. Budget about one to two weeks per branded round, including shipping and review, and confirm with Wecent for your specific changes.

When to plan more rounds

Treat any change to electronics, port layout, rated output or housing tooling as a new product rather than a private label. It needs functional and safety evaluation, and possibly new certification, which is a different timeline altogether.

Where this answer says confirm with Wecent, the detail is not published on the product page and has to come from the datasheet or the factory. General facts come from the standards bodies, regulators or device makers named in the text.

Three more perspectives

Wecent Editorial Team · Purchasing perspective

Ask whether sample costs are credited against the first order, and how many branded rounds are included in the quote. Some suppliers include one round and charge for the rest. Knowing this upfront makes the decision on a third round easy.

Wecent Editorial Team · Compliance/QC perspective

Keep two signed golden samples: one at the factory and one with you or your inspector. Write the date and sample round on the label. When a production lot is disputed, both sides compare against the same physical reference.

Wecent Editorial Team · After-sales perspective

Use the sample rounds to check the user-facing details: manual wording, warranty card, service contact and rating label legibility. These are cheap to fix at the sample stage and expensive after printing.