Amazon.co.jp: Power-connoisseur HL27 High Performance Lithium Ion Rechargeable Battery Replacement for Casio NP-120 [3.7 V 1200 mAh] Large Capacity Replacement Battery Compatible with Original Charger Compatible with Casio EXILIM Camera Battery :
Amazon.com: Synergy Digital Camera Battery, Compatible with Casio NP-120 Digital Camera Battery (Li-Ion, 3.7V 1800mAh) - Ultra High Capacity : Electronics
Amazon.com : Synergy Digital SDNP20 Lithium-Ion Battery - Rechargeable Ultra High Capacity (3.7V 630 mAh) - Replacement for Casio NP-20 Battery for Casio Exilim EX-M1, EX-M2, EX-S1, EX-S1 PM, EX-S100 : Electronics
Amazon.com: Synergy Digital Camera Battery, Works with Casio Exilim EX-S100 Digital Camera, (li-ion, 3.7V, 630 mAh) Ultra Hi-Capacity Battery : Electronics
ANSMANN Li-Ion 3.7V Camera Battery Replacement For NP-20 [Pack of 1] Compatible with Casio Cameras Including Exilim EX-23, Exilim EX-M1, Exilim EX-S1, Exilim EX-S100 & Many More - 5 Year Warranty: Amazon.co.uk:
Synergy Digital SDNP20 Lithium-Ion Battery - Rechargeable Ultra High Capacity (3.7V 630 mAh) - Replacement for Casio NP-20 Battery for Casio Exilim EX-M1, EX-M2, EX-S1, EX-S1 PM, EX-S100 : Electronics - Amazon.com