I have 2 batterys that power my stereo system, But it seems that it drains the batterys just as quick.
I have 2 optimas, What do you guys think?

i believe their are 2 optimas 1 cranking and 1 deep cycle you may want to try the deep cycle with a high reserve capacity.

as for 2 batts going dead as fast as 1 , check to see if battery is good and check wiring maybe one isnt connected rite or has bad connections.