The Energizer ECR2016 CR2016 Lithium Battery 10-Pack offers reliable power for a variety of devices. These batteries are compatible with Energizer ECR2016 CR2016 models, as well as other universal brands. With a long-lasting charge, these lithium batteries are ideal for cameras, drones, and other photo accessories. The convenient pack of 10 ensures that you will have spare batteries on hand for extended use. auto key fobs , and many other uses..