This battery holder is the perfect solution for all of your maker projects, whether you're attaching LEDs to clothing, creating circuit crafts, or adding lights to LEGO constructions. Its small size and compact PCB design (24mm X 24mm) allow for easy integration. Additionally, the ON/OFF switch helps conserve battery life, while the large switch and power terminals make it easy to sew or connect with any type of material. This holder is also LEGO compatible and color-coded for easy circuit troubleshooting (RED for positive, WHITE for negative).