I was just wondering if anyone has used a batcap. Are they better than a cap in you opinion? For those who don't know what it is, its a battery with a discharge rate of a capacitor.
Here is a link to a site that sells them... http://www.ultimate-sounds.com/xstatic/batcaps.htm

Are they worth it? IF I got one i would use it in parallel with my car battery. What do you guys think about it?