Theseus Technology Co., Ltd., also known as Everlasting Energy Co., Ltd. is a professional manufacturer dedicated to the R&D, production, sales and service for replacement laptop batteries.

Located near by the airport in Shenzhen, Theseus Tech. Is covered with 4, 500 square meters area, and equipped with professional R & D team, around 250 experienced staffs, advanced equipments and testing laboratory as well as an efficient management team. With production capability of 50, 000 pieces of laptop batteries and AC adapters every month, Theseus is growing fast to be one of the top laptop batteries manufacturers in China.

The key members of our engineering and R&D department are from the original battery packs manufacturers in Taiwan. With their valued experience of 15 years in the specific industry, our production is technically guaranteed. Thanks to our rich experience, reliable engineering, advanced equipments as well as reasonable prices, fast delivery and professional technical support, we are able to offer you one stop service including R & D, production and after-sale service.

All of the products of Theseus, including every piece of the laptop batteries, AC adapters, and external powerbanks has to be tested well on the original laptops to make sure the product works perfectly on the customer's end. And all of the products are CE, RoHS, FCC, LVD, ISO9001: 2008 certified and produced to meet or exceed the specifications of original products.

Any customized brand design, package box design, sticker design is welcomed and it's one of our value-added service and the customer satisfaction is what we care for the most.