Shenzhen xinguanyuda of the power supply technology co.,ltd was founded in 2003.it covers 3000 square meters with about 150 employees.it is a professional manufacturer of engaged in research and development ,production,sales integration management :lithium battery charger ,electric bicycle charger,power adapter ,switching power.the company has passed the CCC/CE/ROHS/FCC/PSE/KC/CB/UL/LVD/SAA and another security certification . the company promise that all products have 100% of total aging test and conforms to the ROSH and the safety requirements .