So, this will be my first post and I am not sure if it is in the correct place. This is my 3rd year of running cameras, 1st year running with solar panels. I currently have 2 K cell cameras, and 6 IR J's The solar panels are PW-3600. In the last two years I traveled 3 hours each way to change batteries once a month, The solar has cut that in half. I am considering going to 12-volt batteries and the PW-3617 power cord hooked up to the solar panels. I LOVE the ability to adjust settings and receive pictures once a day. I did mess up when I put the last two J cameras out I updated the firmware before putting them out. two different firmware versions. now I need to go out and fix it. Live and learn. So long-winded and all. My main question 12 volt battery and pw-3617 power cord. ????