Samsung

Samsung SDI is a South Korean battery maker headquartered in Yongin, with major battery R&D in Suwon, and it was founded in 1970. It makes lithium-ion cells and packs for electronics, energy storage, and electric vehicles. In the vaporizer and flashlight market, it is best known for cylindrical cells such as the 18650 and 21700 that are widely rewrapped or sold by battery vendors.