I'm not sure how low my voltage drops, but i currently have about 900 rms watts. Amps: JL audio 300/2 and a Rockford Fosgate 500M, I was thinking of getting this SHURiKEN- SK-BT60 battery: SHURiKEN SK-BT60 (SKBT60) 1500 Amp 12V Car Battery Power Cell and place it on thr trunk. I currently have a Optima red top under hood with big 3 upgrade and kicker 1/0 running to the rear to a dist. block that splits to the amps with 4 gauge. Alternator is a 140a (AD244) would this additional be enough to keep my voltage at 14v or...? feedback would be great.