I have 2 moultries that use the 6 volt. 1 lasts pretty good but the other camera sucks it dry in a couple weeks. I asked about the 6 volts on another forum I'm in and a guy gave me a good idea that I'm gonna try. Get a 6 volt motorcycle battery and use it. Its rechargeable and its not that much more expensive if you buy the smaller 6 volt batteries. Its an idea for ya. Ijust bought a 3rd moultrie with the D cell batteries so I have yet to see how long that lasts.