About
A wireless charger factory, not a middleman
Shenzhen Sunning Tension Industrial Co., Ltd. has made charging products in Bao'an, Shenzhen since 2007. We are a contract manufacturer: we do not own a consumer brand, which means we are never on the shelf next to you.
Shenzhen Sunning Tension Industrial Co., Ltd. — 深圳市水润天成实业有限公司 — was founded in 2007 in Bao'an District, Shenzhen. It began in data cables, entered the corporate gift trade in 2012, and has built wireless charging products since 2013. It is a contract manufacturer of 100 to 120 people with no consumer brand of its own.
The 150-word version
Shenzhen Sunning Tension Industrial Co., Ltd. has made charging products in Bao'an, Shenzhen since 2007. We are a contract manufacturer. We do not own a consumer brand, which means we are never on the shelf next to you.
We are 100–120 people with our own injection-mould shop and our own PCBA production workshop. A product goes from industrial design through tooling, board assembly, test and packing without leaving our buildings. A trading company cannot do that — it cannot change the product, because nobody who would have to make the change works for it.
The 147 models in this catalogue were tooled and built for other companies. The moulds exist and can run again, with your logo, your shell and your box. Roughly 80–90% of what we build is exported, mainly to North America, Western Europe and East Asia. Annual sales are USD 5–10 million. Visitors are welcome at the factory.
Three businesses, in order
The company did not start in wireless charging, and the two businesses before it are why the minimum orders are small and the logo work is routine.
- 2007
Data cables
Shenzhen Sunning Tension Industrial Co., Ltd. is founded in Shenzhen to develop and produce data cables. Nineteen years later, cables are still 44 of the 363 listings in the catalogue, from USD 0.69 a piece.
- 2012
Corporate gifts
The company moves into the gift trade — printed logos, small runs, custom boxes, and a delivery date somebody else's marketing campaign depends on. That trade is why minimum orders here start at a few dozen pieces instead of a container.
- 2013
Wireless charging
Wireless charging becomes the main line and has stayed the main line ever since. Twelve of the 13 product families in this catalogue are wireless charging products; 147 models have been tooled.
- Today
The factory now
100–120 people, an injection-mould shop and a PCBA production workshop in Bao'an, Shenzhen. 80–90% of output is exported, mainly to North America, Western Europe and East Asia, with rated capacity of 50,000 to 450,000 pieces a month.
Four names, one company
If you have looked us up you have found four different names, and two of them are abbreviations of a third. Here is the whole thing in one table, because a supplier you cannot identify is a supplier you should not pay.
Sunning Tension is an invented English trade name. It is not a translation of the Chinese registered name, which is why the English name will never resolve in the Chinese company register.
| Name | What it actually is |
|---|---|
| Shenzhen Sunning Tension Industrial Co., Ltd. | The English trade name, and the name on the contract. |
| sunntc.com | That trade name abbreviated — SUN·NT·C. The domain is registered to the company and paid to 2030. |
| SUNTC | The same trade name abbreviated differently — SUN·T·C. It is the sign on our office. It is the same company. |
| 深圳市水润天成实业有限公司 | The registered Chinese entity. The English name was never a translation of it. |
The signage at our office reads SUNTC. If you visit, or video-call into the lobby, that is what you will see on the wall — an older abbreviation of the same English trade name that gives us the domain sunntc.com.
Our Unified Social Credit Code will be published on this page once it is read off the business licence rather than copied from a directory. Until then it is not here, and you should treat any directory that quotes one for us as unverified.
The company, on one screen
Shenzhen Sunning Tension Industrial Co., Ltd. is a manufacturer — not a trading house — founded in 2007, with 100 to 120 staff and its own mould shop and PCBA production workshop in Bao'an District, Shenzhen.
| Legal name | Shenzhen Sunning Tension Industrial Co., Ltd. |
|---|---|
| Registered Chinese name | 深圳市水润天成实业有限公司 |
| Business type | Manufacturer — OEM/ODM contract manufacturing |
| Founded | 2007 |
| Staff | 100–120 |
| Annual sales | USD 5–10 million |
| Export share | 80–90% of output |
| Main markets | North America, Western Europe, East Asia |
| In-house | Injection-mould shop, PCBA production workshop, assembly, inspection |
| Tooled models | 147, across 13 product families |
| Minimum order | From 20 pieces |
| Certification | FCC, CE and RoHS documentation held per model |
| Office | 5th Floor, Building A, Gushu, Rui Shangju, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China |
| Factory | 3rd Floor, 25th Road of Furong, Gushu, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China |
We do not publish our customers
Every model in this catalogue was built for another company. You will not find one of their names on this website — not in a logo strip, not in a case study, not in a caption.
We do not publish our customers' names, and that is the same reason we will not publish yours. Send an NDA with your first email and it is signed before we quote.
It is also why there is no client list on this page. Other factories publish one; some of those names are real and some are a photograph of a car in a showroom. Ours is a policy, not a gap.
What we publish instead
Everything on that list can be checked, which is the point.
- The legal entity, in English and Chinese.
- The mould shop and the PCBA production workshop, and what each one does.
- Three inspection gates, and what is checked at each.
- The certification documents we hold, per model, sent on request.
- Tooling prices and lead times, published before you ask for them.
- 147 tooled models with real specifications, minimum orders and price bands.
- An open invitation to walk the factory with three working days' notice.
Come and look
You are welcome at the factory with three working days' notice — the mould rack, the PCBA workshop, the assembly line, the inspection bench and the packing tables. The one thing we will not show you is another customer's tooling or artwork, which is exactly the undertaking you are about to rely on.