The Varta CR1616 3V lithium electronic battery (reference 6616) is the ideal solution for powering small precision devices such as car keys, watches, garage door openers and calculators. With superior energy density and an extremely low self-discharge rate, this button cell ensures reliable long-term operation without unexpected failures. The protective packaging prevents accidental contact, making it ideal for storing in a drawer at home or in the glove compartment of your car for quick replacements.