Need some advice on a dry cell battery.
I went to a local battery shop yesterday, and asked them if they had a dry-cell battery for my system. The best thing they had was a "Blue top" Optima battery? Well when i asked him how to hook up my battery to run just my stereo off it, he gave me the 30 minute ordeal on how i would need to upgrade my alternator just to be able to keep both my regular battery, and my optima battery charged. Then he tried to get me to purchase a $100 external battery charger for the optima. I am wondering if he was right, and that i do need to upgrade my alternator if i was to get a second battery and run them in "series"? or can it be done with my stock alternator. I have a 2k2 Ford Focus, and i'm running 2 JL Audio W7's and a JL Audio 1000/1 monoblock. I noticed that with my stereo turned about roughly 3/4, the bass ***** soo much power that my car actually slows down...EVER so slightly, but i can tell. help me pleaseeeeeee!
My Upcoming system!!!
HU: Alpine DVA-9861
Components: Focal 165K2P 6 1/2's
Comps amp: Alpine PDX4.150
Sub Amp: JL Audio 1000/1
Secondary Batt: Stinger 1800
LOT o dynamat!