I have a moultrie spinner and timer on my tripod feeder, it is also set to spin in the morning and evening and spins for about 15 seconds. I also have a $25 solar panel reharger on it and i get about 2 months from a fully charged battery. I really don't think that the solar panel is helping because it sits underneath the spinner plate and after just one spin cycle it is fully covered in corn dust. So i think that you may be able to get a couple of month from your battery.