I need to know if i should upgrade my car battery in an 05 grand prix gxp i mean the battery is 5 years old now so soon ill need a battery any how so wat do you guys think of getting an optima battery or wat else should i upgrade while im at it any suggestions please. By the way my system is 2 kicker 500.1 amps pushing 2 jl audio w6 subwoofers so my battery is bad at times.



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