✅Model Numbers : DL2450 / ECR2450 / CR2450. ????20 x Duracell CR2450 3V Lithium Coin Cell Batteries ????. ✅Type : CR2450 Lithium Coin Battery. ✅Chemistry : Lithium (LiMnO₂). ✅Shelf Life : Up to 10 Years. We fulfil tens of thousands of orders every week.