It appears to have imploded, warped, compacted or looks like it's sucking it's breath in but I've never seen this happen to a car battery: Battery was able to start the truck up until now. Threw it on a battery charger and it won't charge up above 12v. It's hovering around 11.89v so how did this battery fail? The battery is 2 years old bought at O'Reilly. Lost receipt so how should I deal with the counter monkeys for warranty exchange?