Duracell LR44 AG13 A76 Button Cell Batteries will provide long-lasting power for devices which need a continuous source of energy, such as calculators and watches. They are ideal for use in children's toys and gives reliable power to hand-held video games and pen lights. Like all Duracell batteries, they are high quality and guaranteed to give superb performance in all temperatures and environments. They will give an extremely long service life with a continuous, low level 1. 5V source of power, which is suitable for all devices that need to run for long periods or are used intermittently.