Oo0o0o yes I saw this on Trucks! Tv yesterday !!


Wire the posative to posative and negative to negative then wire to the alternator. That will keep everything 12 volts. DO NOT wire negative on one battery to posative on the other then to the alternator cuz that will cause a 24 volt load and it will blow everything on ur car that is made for 12 volt only. but yeah its not hard at all, hard to understand? ill draw a picture if u need