Replacement battery for CMOS/BIOS. Specifications: 2700mAh, 3.6V, Lithium, Lithium Thionyl Chloride (ER/TL/LS). Compatible with: CMOS/BIOS. Replaces: PC, ER14505, 15-5104-21000, 2100 Laptop 386, 2900 Terminal, 3-COM Workstation Term. and 39 more. 3-COM replacement battery designed for CMOS/BIOS devices. Tested for reliability and long service life.