5B10W13959, SB10T83201 Compatible with 20ST, 20SU, 20SN, 20SQ, 20YU, 20YQ, 20YS Models Power through demanding engineering, design, and computing tasks with this premium 94Wh Li-ion replacement battery. Designed specifically for Lenovo's flagship mobile workstations, this battery delivers reliable, long-lasting performance for professionals who need uninterrupted power for intensive applications.