I don’t want the optima battery just a good battery. I’ve read other discussions about batteries but they went astray. Just looking for specs like size, cca what people are happy with what works for them. A battery that can be reliable with playing music with car off for a hour every now and very far again. That would be with the draw of a amp no other thrills like lights….. would need a tray also was looking at the sling tunes ssh5 bt open to suggestions.