Rayovac ECR2450 Energizer 2450 Lithium Battery Silver The Energizer 2450 Battery. Power For Heart-Rate monitors, keyless Entry, Glucose monitors And More. Holds Power For 8 years In Storage. Performs In Extreme temperatures (-22 To 140 F) Child Resistant Packaging. Cell Size: 2450 IEC: Cr2450 Type: Lithium Coin Volt: 3 Replacement For: 5029LC, Cr2450, DL2450, ECR2450.