The Lithium Battery Pack and Charger from Spypoint is the only way to go for Spypoint cameras. The upfront cost is easily offset by not having to replace disposable batteries frequently! Another advantage is you almost never have to go near the camera so no disturbing that trophy buck you've been getting pics of until you are ready to hunt him!! Note that this is not a never-ending solution though. Probably once or twice a year the battery will need to be pulled and charged fully. My experience has been that the solar charger cannot fully charge the battery pack like a wall plug does and over time the charge will erode. Be sure to get the correct battery for your camera model and have a spare! That way you can take a fully charged battery to the camera to change it out when the installed battery final poops out. Also be sure to reset the camera to select that battery type (go to settings).