This CTA Digital battery replaces the Casio NP-40 digital camera battery. This battery was designed to meet or exceed OEM specifications and is 100-percent compatible to the original equipment chargers. Make Overstock.com your choice for all your audio and video needs. Battery Specifications: Chemistry: Lithium Ion Voltage: 3.7V mAh (Capacity): 1300mAh Memory Effect: No Warranty: 3 Years For use with the following Casio digital cameras: EXILIM EX-Z40 EXILIM PRO EX-P600 And all similar models.