It is used for remote control, Clock, Calculator, Toys, Digital Devices, Medical Devices, Measuring Device, Flashlights, Games etc. From storm season to medical needs to the holidays, this is the #1 trusted battery brand so you know it’s a battery you can trust. It offers a wide range of batteries to be used in electronics that require reliable power. AA x 4 batteries are multi-purpose alkaline batteries with up to 50% more power (*Longevity performance compared to the Minimum Average Duration of the 2015 IEC AA Digital Camera test. Results may vary by device or usage pattern.