Originally Posted by WineMaster
Have heard this works well. How do ya connect the batteries to the Guru.
I went to Radio Shack and bought a 12v power jack, 2.5mm x 5.5mm. I soldered wires to it with alligator clips on the ends. Made a jumper with another piece of wire and alligator clips.
Clip the jumper to the pos lead on one batt and the negative on the other. Then hook the appropriate clip to the pos and neg to neg.