Duracell Lithium Coin batteries provide reliable, long-lasting power for your specialty devices, so you can be confident these lithium coin batteries will be ready when you need them. Duracell has a tradition of investing in extensive development in features that can help keep children safe, specifically for its lithium coin batteries. Its latest innovation is a bitter coating on the cell that helps to deter accidental ingestions. Duracell also features child secure packaging which makes it nearly impossible to open with bare hands. Battery Type: Lithium; Battery Size: 2016; For Use With: Everyday Electronic Devices; Medical Devices; Security Devices; Voltage: 3 V.