adding an extral battery helps?

[Chrispy 10+ year member]

I sustained 4K with a stock 130amp ....Big 3....and 2 large batts in my trunk //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

Same here for the last year with a 140 amp alt.