A-Cas NP 20 Product Description:

corresponds to Casio NP 20 (digital camera)
3,7 V/ 700 mAh
for camera types Casio Exilim EX-S 500 / EX S-600 / EX S-600D / EX S-770 / EX S-100 / EX 23 / EX S1
EX-Z5 / EX Z-70
EX M-1 / S1 / M2,   EX-S1PM, S1, S3

Ansmann replacement batteries meet or exceed manufacturer's specifications and are guaranteed to conform to the cameras or camcorders it is designed for.  2-year warranty