This CTA digital battery replaces the Fuji NP-40 digital camera battery. It was designed to meet or exceed OEM specifications and is 100-percent compatible to the original equipment chargers. Charge up on fantastic deals for all your digital and electronic needs with Overstock.com. Specifications: Chemistry: lithium ion Voltage: 3.7V mAh (capacity): 550mAh Run time (shooting time): up to 2 hours For use with Fuji FinePix F402, FinePix F700, and all similar models This battery does not use memory effect.