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Thread: Second Battery?

  1. #11


    There is also the possibility that your 16 year old factory cables just don't cut it and resistance is causing your alt to not deliver all 105 amps. When I replaced my factory cables my voltage gauge jumped up to 15.5v charging the battery.

    So list of what you can do to correct the problem:
    Upgrade alt and ground cables to 1/0 AWG and fuse leads to 4 AWG
    Upgrade to bigger factory alternator or aftermarket one (I'll post some links)
    Add second battery(really replace current and buy 2 new identical ones) and using an isolator create dual battery set up for running sound system when not running truck.
    Use 1/0 AWG cable for the second battery and its grounds.
    Make sure cables are 100% Oxygen Free Copper and check the strand count! I linked the Over sized cables I used that are pricey but worth every penny.

    Ok, we also have a few members with nice dual set ups like @PantheraUncia and former member @SurrealOne they both have full pics and explanations in their profiles I believe. Also I have a thread that they both helped me out on in the Tahoe sections which I will link. The thread starts with an argument about battery brands but it has info and links through out.

    Aftermarket alts:
    Link to thread:
    Link to the high quality cables I used in my truck:

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage:

  2. #12


    My Dual battery setup is fairly simple, but if the battery is draining overnight, or that fast I have two questions, how much power are you pushing and is the system grounded properly? I will have to see if I can dig the photo's up.

  3. #13


    the battery isnt draining over night n as far as i know it is i mean its still stock havnt messed with any of the grounds n i think i might once i get a bigger alternator sometime in the near future

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