[Michael C Henry]

I have a yellow top Optima battery .I figure it's almost 3 1/2 years old The car has been laid up for the past 2 1/2 years.It seems to have gone bad .Is that likely?It was charged last week .When I started the car for cam breakin ,the gauge went to 16V and trimmed back to 13 to 14 V. Now I climb in and it has fallen to below 10 and I'm charging it Did I kill it?I bought it for releiability Is there a better batteryand where would be a good place to buy it or another?