Extra Battery in trunk.

[Aaron Gorden]

Ive seen a few pictures on this site now and a few people run with an extra battery in the trunk....is this a good idea? isnt it more of a drain on the alternator? Need some advice as to where this is a good idea and where not

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[littleharv93 10+ year member]

i also would like to know

 

[9515ROB 10+ year member]

thats why alot of us who have extra batteries also run High Output alternators to help with charging them and the load we are putting on the alt

 

[outsideshot23 10+ year member]

ya its hard on the alt running more batts.. i would suggest a ho alt

 

[nateberrier 10+ year member]

If you are running 2000rms or less you dont need to **** with a new alternator. A second battery and the big three is sufficient.

The big three is your battery Pos to Alt Pos, Battery ground to Chassis, Chassis to Engine block. You essentially upgrade these with heavier gauge wire to allow your car to charge easier. To run a second battery in the trunk, most people find a good chassis ground in the back, sand it, and bolt down a piece of 1/0, and then run a section of 1/0 to the front battery Pos terminal. you can then connect your amps to the battery in the back, you wont see dimming unless you over come the battery in the back either //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Be sure to run an AGM glass matt battery as lead acid batts give off dangerous gasses.