About Dongguan HJ Technology Co., Ltd.
Power bank – wireless earphones factory. Dongguan HJ Technology Co., Ltd. focuses on providing quality products and reliable solutions for customers and business partners in global markets.
Who We Are
Power bank – wireless earphones factory
Dongguan HJ Technology Co., Ltd. is a supplier of Powerbank and TWS earphones, working with OEM and ODM, wholesale, brand business, promotion gift and other client types. We provide high-quality one-stop services for HJ Technology products.
Based in Humen Town, Dongguan City, Guangdong Province, China, with locations in Dongguan & Shenzhen, we keep our communication professional and straightforward, and we aim to build long-term business relationships based on product quality and reliable service.
11 yearsYears in industry & exporting
Dongguan & ShenzhenLocations of company
USD 8,000,000Annual export revenue
100.0%On-time delivery rate
Company Facts
Business profile
Quality Control
How we guarantee quality
- Supply chain partners
- 40
- Raw material traceability
- Yes — product support traceability of raw materials
- Inspection method
- Inspection of all products, random inspection, according to client’s requirement
- QC on all lines
- Yes — quality control conducted on all production lines
- QA / QC inspectors
- 10
In terms of quality, the average defective rate in the power bank and TWS earphones / charger industry is 3%–5%. Through strict selection of raw materials, meticulous production and multiple rounds of quality inspections, Dongguan HJ Technology Co., Ltd. has kept the defective rate below 2%.
All our power banks use original lithium-ion battery cells — A-grade batteries for a safe, stable charging environment.
R&D Capabilities
Customization & development
- New products (last year)
- 20
- R&D engineers
- 20
Customization options
- Sample processing
- Graphic processing
- Customized on demand
- Light customization
Minor customization covers items such as customized logo and customized packaging. Deep customization covers appearance and structure design with mold development according to your requirements.
Certificates
Company & product certifications
HJ Tech is a supplier of Powerbank, TWS earphones and chargers holding company and product certificates.
Company certificates
ISO and BSCI certificates.
Product certifications & patents
Appearance patents, invention patents and utility model patents. Product certifications include CE, RoHS, FCC, REACH, MSDS, UN38.3, plus air and sea freight transportation identification reports.
Remark: MSDS / UN38.3 / transport reports of the battery cell are provided for power bank products.
What We Offer
Our Products
Our current catalog is organized into four product categories. Each category section shows actual product images from our range.
How We Work
Our Approach
- Product quality — focus on well-made products suitable for business customers.
- Reliability — consistent products and dependable communication.
- Customer service — prompt, clear responses to product inquiries.
- Professional communication — straightforward discussion of products and requirements.
- Long-term business relationships — cooperation oriented toward continued partnership.
- On-time delivery — after orders are placed, progress meetings are held twice a week; workshop, quality inspection and logistics teams work together and solve problems on the spot to ensure on-time delivery.
FAQ
Frequently asked questions
Answers to common questions about customization, orders, production, quality and delivery.
Do you provide customization services?
A: Minor customization, such as customized logo and customized packaging. B: Deep customization, which covers appearance and structure design with mold development according to your requirements.
What is your minimum order quantity (MOQ) for each model?
Usually 500–1000 pcs depending on the model and raw material situation.
What is your MOQ for customized packaging?
3000 pcs for OEM orders.
What payment terms do you accept?
We accept T/T, Western Union, Alipay, WeChat, L/C, etc.
What delivery methods are supported?
EXW (Ex-works), FOB, etc.
What shipping options can you offer?
By air, by sea, by international express (DHL, FedEx, UPS, TNT), by air dedicated line, and by China-Europe Railway Express, according to customers’ requirements.
How long does mass production take?
Usually 20 to 30 days for quantities under 50,000 pcs. Special situations are negotiated and re-checked.
Do your products come with a warranty?
Yes, we provide a 1-year warranty for all products.
What battery cell is used inside your power banks?
All our power banks use original lithium-ion A-grade battery cells for a safe, stable charging environment.
How do you guarantee quality?
Through strict selection of raw materials, meticulous production and multiple rounds of quality inspections, Dongguan HJ Technology Co., Ltd. has kept the defective rate below 2%, compared with an industry average of 3%–5% for power banks and TWS earphones / chargers.
How do you guarantee mass production time?
After customers place orders, our team holds progress meetings twice a week. The workshop, quality inspection department and logistics department work seamlessly together, and any problems encountered are solved on the spot to ensure on-time delivery.
Cooperation Details
Payment, shipping & after-service
Payment methods
Bank transfer by T/T, for example: DBS Bank (Hong Kong) Limited, JP Morgan Bank Hong Kong Branch, Deutsche Bank Hong Kong Branch, Banking Circle Denmark, Banking Circle S.A., JPMorgan Chase Bank (USA), etc.
Small payments: Alipay, WeChat, Western Union, PayPal, etc.
How to ship
By air, by sea, by international express (DHL, UPS, FedEx, TNT), by air dedicated line, by China-Europe Railway Express.
MSDS / UN38.3 / transport reports of the battery cell are provided for power bank products.
After-service
Strict quality control checks are in place, plus a 1-year guarantee for after-service.
Non-warranty items: items outside the 1-year warranty time-frame; washed, worn, used or misused items. Defective products must be authorized via the Support Center — items without a Return Merchandise Form (RMA) are not accepted. When a problem is reported, we communicate immediately and offer a treatment plan.