Original Casio NP-20 Battery for EX-Z3 EX-Z7 EX-M1 EX-M20 EX-S4 EX- S20 EX-S500 | eBay
Casio NP-20, NP-20DBA Battery (2-Pack) and Charger by Wasabi Power
Battery and Charger for Casio NP 20 NP20 and Exilim EX Z60,EX Z70, EX Z75,EX Z77,EX S500,EX S600,EX S770,EX S880 Digital Camera|Digital Batteries| - AliExpress
Genuine Casio NP-20 Lithium Rechargeable Battery for the Digital Camera 700mAh 79767682583 | eBay
CASIO NP20 NP20 Battery Charger Compatible with CASIO Exilim EX Series Casio Exilim NP20 NP20 Battery for Exilim EXM1 EXM2 EXM20 EXS1 EXS2 EXS3 EXS20 EXS10 - Newegg.com