What is Best Cr2 Lithium Battery - Consumer Reports - PetMoz Features. CR2 Lithium Battery CR15H270(CR2) Size Dia*H:0.59x1.06 (inch) Battery can not be recharged . Advantages: High energy density ; High open circuit voltage ;Wide range of operating temperature; Stable operating voltage and current; Long operating time;Low self-discharge rate (less than 1% per year at 25ºC)