the 9 volt that powers the board will last apx 9 months if you include winter. that is TN winters, you obviously deal with somewhat colder temps in IL. most guys in your climate get better than 7 months out of the 9 volt. for the camera, i use 2500 MAH rechargeables, they typically last about 10-14 days(depending on number of triggers) in cold weather. bottom line is this, with a 256 MB memory stick i get 128 pics in the highest resolution, (4MP) typically the AA batteries powering the camera will be ready to change when the stick is full. this is in winter. during summer they will go much longer. thanks.