IMO I would buy the hh1 or brain unit from hillhopper at hagshouse. I have both boards, they will run off 1 nine volt for 3-4 months. combine this with sony p32 camera that uses 2 AA batteries and you got one hecka of a unit that isn't a battery hog. the p32 will take about 300-500 pictures for ya on the 2 AA's. Just my 2 cents.