How can I increase battery life? - Epson PhotoPC 600 Digital Camera

Transferring images from the camera to the computer requires a lot of battery power. It is recommended to use the AC adapter when transferring pictures to conserve battery life. If not using the AC adapter, make sure your batteries are fully charged and use the highest possible serial speed when connecting the camera to the computer. After transferring your images remember to shut off the camera, otherwise the camera will remain "awake" and will continue to wear down the batteries. The LCD display also uses much battery power and should be used sparingly when trying to conserve power usage. Battery life can be improved by using AA sized lithium batteries, rechargeable AA Ni-Cad batteries, or rechargeable AA Ni-MH batteries instead of AA sized alkaline batteries.