This battery is a direct replacement for the Casio model number NP-40C. It is a 3.7V 1300mAh Lithium Ion Battery.
It is also a direct replacement for the following Casio numbers:
EX-Z30
EX-Z40
EX-Z50
EX-Z55
EX-Z57
EX-Z750
EX-P505
EX-P600
EX-P700
Dimensions: 1.5 x 1.5 x .38 in
Weight: 1.1oz