gage wire question

[tav]

I want to add another battery to my existing trolling battery not sure what gage wire
to use. basicly pos-pos neg -neg. running a mk 40 lb. trying to get more runtime.

thanks

[Barnacle Bill]

You can buy battery cables at your local auto parts store. They come in different lengths and I believe they are 4 gauge.

[Cray]

6 would work 4 would be better. Go to parts store and get 2 battery cables that have ring eyes already installed on each end. One red and one black. Cheapest and easiest way to do it.

[tav]

thanks guys

[cache22]

If batteries are next to each other, I don't think there is any reason to go any heavier than 8 ga.