Replacement battery fits 83 IBM models, including Thinkpad. Specifications: 200mAh, 3V, Li-ion. Compatible with: Thinkpad 570, Thinkpad 570E, Thinkpad 570X, Thinkpad 570Z, ThinkPad A20, ThinkPad A20P and 77 more compatible models. Replaces: IBM 02K6541, IBM 02K7087, IBM 02K7075, IBM 08K8050, IBM 02K6572, IBM 92P0991 and 3 more. IBM replacement battery designed for CMOS/BIOS devices.