Np-80 3.7v 700mah Camera Rechargeable Lithium Ion Battery For Casio Mr1 Ex-z1 Z2 Camera Battery - Digital Batteries - AliExpress
Amazon.com : Synergy Digital Camera Battery, Compatible with Casio Exilim EX-Z700 Digital Camera, (Li-Ion, 3.7V, 1300 mAh) Ultra High Capacity, Replacement for Casio NP-40 Battery : Electronics