From the Manufacturer
USB cradle and AC adaptor for the EX-Z30, Z40, Z50, and the Z55. The cradle will also charge your battery while it is in the camera.
Works with the following models:
Easy-to-see charging and USB lamps
Works with Casio EX-Z30, EX-Z40, EX-Z50, EX-Z55
USB cradle and AC adapter combination device
Charges battery while it is still in the camera
Easily connects to your personal computer