deep cycle marine battery? will it work

[the excuse]

can i use a deep cycle marine battery in my blazer? i donnt really understand how the deep cycle batries work. right now somethimes when i have my brights on and i try to roll up the windows there is a major shortage on battery juce. everything starts dimming and brightens as the alternator turns over. i have to shut off the lights in order to put the windows up. the alternator seems new too, its much shinier thatn the rest of the engine bay.

 

[unclematty]

deep cycle means that it can be drawn upon heavily without causing permanant damage , it can be discharged many times without damage. A heay duty alternator should be used in conjunction with a deep cycle. as to your problem I would say check out the output of the alternator , maybe a smaller diameter pulley on it, or turn the engine idle up slightly, or maybe your window regulators are drawing too much amperage, check the alternator first. hope that helps /forums/images/graemlins/waytogo.gif /forums/images/graemlins/hack.gif /forums/images/graemlins/weld.gif /forums/images/graemlins/grind.gif

 

[84_Chevy_K10]

Deep cycle batteries are not made for engine starting.

I wouldn't run one as a primary battery.

 

[Pookster]

Its not that its not recommended. There's no problem with doing it. Its just that the deep cycles cant discharge enough out that is needed during starting- to properly size the same CCA's out of a deep cycle as a standard car batt, you would need almost a 75% increase in battery size. Hence, it dont fit in most engine bays. /forums/images/graemlins/smile.gif