The Braille I25X. This will be my next battery or something like it. On my third Optima in 6 years. They fail at the 3 year warranty mark. As they approach critical mass, they do start to spit acid from the 2 ports. Yes there is local paint damage. As these batteries use to last for a long time, It seem they are now engineered to fail at there warranty point. My car /battery is always on a tender when the car is parked. Optima's are junk.