Replacement battery fits 11 OTC compatible models. Specifications: 1200mAh, 9.6V, Ni-MH. Compatible with: Genisys, Genisys EVO, Cornwell Tech/Force, Supreme/EVO, Mac Mento, Pro and 5 more compatible models. Replaces: OTC 239180. OTC replacement battery designed for Engine Fault Code Reader devices. Provides reliable power for your device.