How are the Stinger batteries? Do they work well? The reason why i'm asking this is cause the Stinger SP2150 fits my car. The dimentions of this battery is H=6.75in by W=7.75in by D=6.5in. My stock battery is H=7.5in by W=8in by D=6.75. This battery is smaller then my stock battery but not by much. Anyone have experince with these batteries? They are good? Thanks.