Its about that time for a Battery Replacement for my EM2. While getting my tires and wheels re-balanced, they checked my battery and showed me that CCA are really low, and with school starting soon and winter soon after I'm going to want to fix this now. Just wondering what would be a good battery to get. Ive heard Optima Yellow Tops are good, especially if you have a sub and amp set up, which I do. Any suggestions or testimonals?
Thanks guys!

 

Why not get a decent battery charger that can desulfate your battery? You can double the life of your battery by desulfating it, letting the charger pay for itself.

 

I think ive got one at my house. But doesnt that just raise the voltage back up and not the cold cranking amps?

 

That's a smart charger, perhaps or even as lowly as a battery equalizer. There is battery equalization, 3 step charging and then battery desulfation. If you have a hydrometer, first charge the battery on a smart charger, then check each cell to see if they match. I had a battery from 2003 that had two cells that were severely undercharged with the rest of the cells overcharged and I equalized them which helped significantly. But if the cells are equalized (all have same state of charge) then the next step is to use a battery charger that can desulfate the battery. Equalization is pretty much just overcharging the battery until the cells in the battery match in state of charge while desulfation is the act of running a varying 2-6mhz pulse through the battery continuously in order to break up the lead sulfate inside the battery. This helps reduce the resistance inside of the battery which in turn allows you to access formerly lost battery capacity.

 

I'll deffinately have to check on that man. Very helpful. However just in case. What would be a good brand?

 

This one is a good charger and battery desulfator http://www.amazon.com/gp/product/B00...A2U296R8AN80PO and this one can charge batteries if they're not too discharged (more than 11.8v) and has the same desulfating functions apparently as the more expensive one above. http://www.amazon.com/gp/product/B00...=AR8XJJ19SNPNX

 

One caveat though, is that after buying the charger, it still may not work. It tends to be good for older batteries that have been used in a standard manner and still read with good voltage.

I had the original battery in one of my Civics for 8 years and was still running strong until I completely drained it with the stereo on without the car running. For three nights in a row I was working on my car in a warehouse at work and had the radio on. The third night, I completely drained it, and that was the end of it as the lead had precipitated out of the plates from being discharged.

Since you said you had a system, if you've run it with the car off, you may want to consider a new battery altogether. I think I paid around $70 when I replaced it.

 

Yea good point. Thanks. I just didnt know what were some good brands to purchase a battery for.