Battery Life batteries are thoroughly tested and checked for safety and quality. Battery Life 3 volt button coin cell batteries. Battery Life. Shelf life: 10 years. Also known as: DL1620, ECR1620, BR1620, 280-208, DL1620B, BR1620-1W, CR1620-1W, KCR1620, LM1620, 5009LC, L08, EA.