Low-cost Battery-powered portable widescreen DTV

Step 4 Attach holder for fifth battery:

Strip the tips of the single D cell holder wires just enough to wrap them around the two screw contacts you just inserted on the 4-cell holder. Be sure to connect the negative wire to the positive screw contact and vice versa so the power runs through the fifth battery (this gives you a total of 7.5v of power, 1v more than the MG2000 needs, but enough to power the receiver without harming it. 6v isn't enough power w/o the signal cutting in & out, and there is no combination of off-the-shelf 1.5v batteries to give you exactly 6.5v of power.)