DshngDaryl

I am betting that when you get your car started, or at least the battery charged all the way, the sound will go away.

Wilson2000

I found an Optima Yellow Top in stock for my SC at AutoZone. It was over $300! It is a group size 48. I expect it to last about 5-years based on the previous Interstate AGM I purchase for my SC. Our SC's can be mid to awful on parasitic battery drain, depending on the health of your electronics. As capacitors age, they leak current, and drain your battery, even beyond the expected normal parasitic drain.

lugnuts

Found AGMs at both Sam's & Walmart - both had same make and same price, however, Walmart had 2 additional years of warranty over Sam's.