Founder & Senior BMS Engineer · TOPTAI
Start a Project YOUR PORTABLE CHARGER PARTNER
A Reliable Partner for
Customized Charging Products.
TOPTAI combines manufacturing expertise with international trading experience. We began our business in 2007 and established our own factory in 2009. Today, our Shenzhen factory leads product research and development, assembly and testing, while our Dongguan manufacturing partner handles PCB SMT assembly, mold making and injection molding.With expertise in product structure and circuit design, hands-on production capabilities, our own quality-control standards and extensive export experience, the TOPTAI team helps customers manage the full journey from product selection and manufacturing to shipment. Our understanding of markets and customer needs keeps each project focused on practical commercial requirements.Most importantly, both founders remain actively involved in electronics development and market-facing work. Their direct involvement helps us build consistent product quality into each project from the outset and support our customers’ sustainable business growth.
Business Began2007
Shenzhen Factory2,000 m²
Partner Factory8,000 m²
Daily Output2,000 PB / 3,000 WC
OUR STORY
A Business Built Step by Step
Our history is grounded in everyday work: understanding buyer needs, solving product issues and staying accountable through delivery.For more about TOPTAI’s company background and wider product portfolio, visit About TOPTAI on our main website .
- 1999–2005
Industry Experience Builds
Liu Yan developed electronics-manufacturing experience before beginning the entrepreneurial journey with Grace Wong in March 2005.
- 2007
TOPTAI (HK) Technology Co., Ltd.
The Hong Kong trading company was established in July to support international buyer coordination.
- 2009
Shenzhen Factory Established
Shenzhen TOPTAI Technology Co., Ltd. was established in September, bringing product assembly, testing and shipment control together.
- 2019
Dongguan Capability Added
Liu Yan invested in a Dongguan partner factory, adding controlled PCB production, tooling and housing injection to the production network.
- Today
End-to-End Charging Product Control
A 2,000 m² Shenzhen factory, 8 engineers, 3 quality-control staff and an 87-person team coordinate development, circuit control, assembly, aging tests and delivery.
WHY BUYERS STAY WITH TOPTAI
People, Communication and Ownership You Can Rely On
Our founders and core team remain close to the decisions that affect product programs, buyer communication and delivery follow-through.
Co-Founder | Custom Charging Solutions Lead
Grace Wong
Grace Wong is a co-founder of TOPTAI and leads custom charging projects for key B2B clients. With industry experience since 2007, she works closely with brands, wholesalers and distributors on product selection, customization, compliance documentation and production coordination—helping buyers choose practical charging solutions for their markets.CORE PROJECT TEAM
Four Essential Team Members Behind Every Program
Meet the people who connect technical readiness, production communication and delivery follow-through.
BMS Engineer
Wang Bei
10 Years of ExperienceSupports battery-management system evaluation, protection parameters and power-bank performance verification.
PCB Engineer
Zhu Ziyuan
8 Years of ExperienceSupports PCB technical evaluation, manufacturing feasibility and production communication for project requirements.
Order Follow-up Specialist
Jenniffer
5 Years of ExperienceCoordinates sample progress, production communication, timelines and order follow-up for buyer projects.
Finished Goods Warehouse Administrator
Sheng Yuan
8 Years of ExperienceCoordinates finished-product storage, order readiness, packing checks and dispatch preparation.
OUR OWN FACTORY · SHENZHEN
Product Development, Assembly & Testing
Our own Shenzhen factory brings product development, assembly and testing together, with TOPTAI’s quality-control standards applied throughout.- R&DProduct structure & circuit design
- AssemblyBattery soldering & product assembly
- TestingFunctional checks & aging tests
OUR MANUFACTURING PARTNER · DONGGUAN
PCB SMT, Mold Making & Injection Molding
Our partner factory handles PCB SMT assembly, mold making and injection molding. These manufacturing stages are coordinated against TOPTAI’s confirmed product specifications and quality-control standards.8,000 m²Partner CapacityPCB SMTAssembly SupportInjectionHousing Production
See Manufacturing Capability 
WHO WE SERVE
Customized Charging Solutions for European & North American Markets
TOPTAI focuses on the needs of European and North American markets, helping brands, wholesalers and distributors develop charging products for their customers.Wholesalers & Distributors
Stable product programs, reliable supply coordination and clear support for wholesale channels.
Brand Owners
Private-label power bank and wireless-charger development with flexible OEM/ODM support.
Trading Companies
A responsive Shenzhen partner for product selection, samples, quality coordination and export readiness.
Promotional Gift Companies
Custom-logo charging products, packaging and presentation solutions for corporate projects.
WHAT WE DO
Charging Solutions Shaped for Your Market
Build a practical B2B product range with power-bank and wireless-charging solutions selected for your channel, customers and customization needs.
Power Banks
Magnetic, fast-charging, solar and compact power-bank programs for global product lines.
Explore solutions
Fast Charging
Higher-output, multi-port and built-in-cable formats for differentiated B2B assortments.
Explore solutions
Rugged & Solar
Rugged portable charging formats with solar support for outdoor and emergency product programs.
Explore solutions
Wireless Chargers
Qi2, desktop, car and multi-device charging solutions for retail and private-label channels.
Explore solutionsHOW WE HELP
One Team Across Product, Customization and Delivery
We coordinate the commercial and technical details buyers need to move a charging project forward with fewer gaps and clearer ownership.Share Your RequirementsProduct & Engineering
Product selection, specification review, structure evaluation and function planning.
OEM/ODM Customization
Logo, color, packaging, accessories, manuals and selected product development.
Quality Coordination
Defined checkpoints from incoming materials to finished-goods review before shipment.
Buyer Support
Samples, project timelines, documentation, shipment planning and follow-up communication.
HOW WE PROTECT QUALITY
Checks Buyers Can Understand
Quality is not a final inspection only. We coordinate defined checkpoints throughout the product program and document what matters for delivery.ISO9001 quality-management system
Incoming-material and production-process checks
Power-bank and wireless-charger functional testing
Capacity, charging and aging-test coordination
Finished-goods sampling to AQL 2.5 / 4.0 standards
See Factory & Quality HOW WE COOPERATE
A Clear Path from Requirement to Delivery
Clear stages create fewer assumptions, faster feedback and a better basis for a long-term program.Understand
Share your market, target price, functional requirements and project priorities.
Develop
Confirm product selection, technical feasibility, branding, packaging and samples.
Control
Coordinate incoming material, production checks and pre-shipment quality review.
Deliver
Align documentation, delivery schedule and export support before shipment.
VISIT OR CONTACT US
Our Shenzhen Location
See where our project team is based and arrange an appointment before visiting.22.645324° N114.084051° E
Map data © OpenStreetMap contributors
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