Battery Capacity: 650 mAh | Battery Chemistry: Alkaline | Battery Size: AAAA | Brand Name: Duracell | Number in Package: 2 pk | Packaging Type: Carded | Rechargeable: No | Sub Brand: Ultra | Volts: 1.5 volt These batteries feature Dura lock Power Preserve technology to help in providing increased battery life and longer service life. They are designed for use with small electronic devices including calculators, key fobs, memory backups and testing meters. | For use in medical devices, watches and electronic devices | Replaces 1.5 volt alkaline battery | Easy to use