Hello all! I am new to this site and looking for help. This is what I've done so far. I made two 4.5" x 4.5" screens from 1/2 chicken wire. I have hooked up a 9v battery to the screens. One lead to each screen. Then the screens where placed in a planter one across from the other. I guess creating a field?? Anyway the plant with the device doubled in growth rate from the control. My problem is that it eats up 9v batteries. Any ideas? Would it be ok to use a 9v wall wart? I would like to keep it battery operated. Thanks for the help.