School me up on adding a second battery

[KilluminatiDre 10+ year member]

I'm getting ready to add a second battery UNDER THE HOOD, not in the back. The distance between the 2 batteries isn't very far. Would a single run of 1/0 be good for the distance in between the two batteries and then 2 runs of 1/0 from the second battery to the amp?

Big 3 is done.

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[tymoto21 10+ year member]

WHAT amp?

If it’s not far I would just do 2 runs to the second battery

You can never have too much wire

 

[KilluminatiDre 10+ year member]

WHAT amp?If it’s not far I would just do 2 runs to the second battery

You can never have too much wire

Gonna be a Wolfram W-4500 unless I change my mind last minute and go bigger.