ThatGuyWithAJetta Posted May 3, 2012 Report Share Posted May 3, 2012 So today and my friend and I were having an argument about installing a second battery his argument was that adding a second battery in puts more strain on the alternator, is this true or not because I didn't think it will put that much extra strain on the alternator. !999.5 Volkswagen Jetta 1 Planet Audio BIg Bang 15 Powerbass 1500,1 Link to comment Share on other sites More sharing options...
CLNFREAK Posted May 4, 2012 Report Share Posted May 4, 2012 it will yes... if you deep discharge the second battery and expect the alt to charge it back up.. I have a 350 amp alt and 2 batterys (one in stock under hood location) one in trunk.... I charge them twice a week Link to comment Share on other sites More sharing options...
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