Get reliable performance with the Black and Decker BDCS50C 4V Roto-Bit Storage Screwdriver. It features a 4V lithium-ion battery that holds a charge for up to 18 months. Ideal for construction work and home repair, the lithium cordless screwdriver has a rotating bit cartridge that stores bits and provides easy accessibility. It also includes eight bits for a wide variety of tasks around the office or worksite. The Black and Decker screwdriver includes an onboard magnet that holds extra screws, freeing up your hands for other tasks.