Eveready EL2CR5BP Lithium Photo BatteriesEveready EL2CR5BP Lithium Photo Batteries Features:; High energy density, long life power source; Good low and high temperature operations; Up to a 10 year estimated shelf life at room temperature; Long life electronic equipment for calculators, cameras, memory backup, pocket pagers, and watches; Carded; EL1CR2BP: 3 volt, replaces DL1CR2; EL2CR5BP: 6 volts, replaces 2CR5