These alkaline button batteries feature Duralock Power Preserve technology, which means they last for up to 5 years of shelf life. Model Duracell LR44 1.5 V are button cell batteries with greater use and with the largest number of electronic devices, given its capacity and size as very versatile. Their use are widespread for electronic devices with low energy demand such as calculators, laser pointers, remote controls, security systems, toys, measurement devices and more. This pack contains 2 Duracell button batteries.