Which one to get (battery)

i was wondering what kind of battery i should get? i have owned my truck for over a year ans i have never replaced the battery. now i have electric fans and when they turn on they draw i think like 30 amps and my lights dim for a about two seconds if i am not moving fast. and i know it is going to happen. but i was thinking about getting a optima battery but i dont know which one to get. the red cap or the yellow which is a deap cycle. if you know anything. that might help me please let me know. thanks. :evillol:

I just picked up an Optima battery for my civic after my original was killed recently, and this thing is great. Get the yellow deep cycle battery. You can find the model battery you need here (http://www.1st-optima-batteries.com), but you will probably find it for much cheaper on eBay, just do a search for "optima yellow", and that should work.

If you can fit a larger than normal battery, get the really big deep cycle. It has a lot more Cold Cranking Amps. I'm looking into adding a second battery for my stereo amps so my meadlights don't dim. Yours dim for 2 seconds you said... try having them blink everytime the bass hits! I'm gonna get the biggest Deep Cycle I can find. Optima has one for about 170 that has 950 CCAs I believe. With Deep Cycle Batteries, they are better for heavy current drawls (for lighting, stereos, or fans), but if its your primary starting battery, it will need a little more CCAs than a standard battery to get starting done efficiently. Hope this helps a little.

yeah i used to have two solo baric 10's in my truck with a directed 1100 amp. i had the same problem, lights dim then i kept on blowing my speaker so i gave up.