Lithium ion rechargeable battery pack for exclusive use with Olympus digital cameras FE-4040 and X-940. Connect your FE-4040 or X-940 camera to the computer and let the battery charge while you save and organise your images. Alternatively you can use the super-compact AC Adapter F-2AC supplied with your camera or the optional available F-1AC Adapter for charging the LI-70B rechargeable battery while you are traveling.