CR2016 Lithium 3V Battery Power your garage door remotes or replacement car keys with confidence using the Maxell CR2016 – a compact and reliable 3V lithium coin cell battery made in Japan. Ideal for slim electronics such as car key remotes, digital thermometers, fitness trackers, calculators, glucometers, and small gadgets, the CR2016 delivers stable, long-lasting power in a premium-grade, child-safe package.