So I got the dreaded dimming when ever my bass hits. The system isn't huge so the dimming isn't drastic, just slightly noticeable. My only option at this point is a better battery. I do not want to add a secondary battery. Cap is not an option as that would just be another load on the electrical system and won't help my dimming. So i'm looking for a good replacement battery for my entire vehicle. Something with low internal resistance so it can give output easy when demanded by the amp and recharge quickly by the alternator. Only option i've found so far is the Optima Yellow Top. They don't make a Red Top anymore to fit in the stock location. I don't have much experience with deep cycle batteries and hear they don't respond very well to being constantly charged by the alternator. If this is just a myth, tell me so... I've looked at Oddessey and at Braille but their websites suck and don't clearly say which one I would get so I can put it in the stock location. Any ideas at what would fit my needs?