The Sony ACC-CSFG Kit With Li-Ion Battery / Charger For Cyber-Shot Cameras includes an NP-FG1 battery and a convenient travel charger. This is a great solution for revitalizing your battery life while you're on-the-go. The battery functions as a replacement for your original or as an extra, thereby enabling continuous shooting because one of the two can be charging while the other's in use.
The NP-FG1 can be charged or discharged at anytime without developing memory effect. This means it will never lose its ability to hold a full charge. The battery also supports Sony's InfoLITHIUM system, providing information that allows the camera to display remaining battery capacity on the LCD or electronic viewfinder via continuous communication (only for camera models supporting InfoLITHIUM features).