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<blockquote data-quote="spin dB" data-source="post: 2261516" data-attributes="member: 571349">AS I said it is a good Idea.&nbsp; If you do the install the second batt into a closed circuit and you make sure that your connections are tight and that you have made sure the terminals on both batts fits the posts snuggly then you should not have to run another set of fuses.&nbsp; This is true! I didn&#039;t say that it is the best option.&nbsp; His question what does he have to and the answer is No! However it is a good Idea.&nbsp; If you run the fuse and run it in a closed loop then you are more safe than if you just run the closed loop or if you just run the fuse!Contrary to popular belief power does NOT run from Pos to Neg but the other way around.&nbsp; If you connect the second batt the same way most connect an amp then you are charging the frame of the vehicle with another 12v power supply.&nbsp; If your amps are grounded to the car and not to the neg on the batt then you are also charging the frame.&nbsp; In line fuses don&#039;t do anything for the amps, they are only there to protect the car in case of a electrical shock.&nbsp; If you run the amp&#039;s ground to the car and then do the same with a batt you will have to run even larger fuses to protect your car.</blockquote>

[QUOTE="spin dB, post: 2261516, member: 571349"] AS I said it is a good Idea. If you do the install the second batt into a closed circuit and you make sure that your connections are tight and that you have made sure the terminals on both batts fits the posts snuggly then you should not have to run another set of fuses. This is true! I didn't say that it is the best option. His question what does he have to and the answer is No! However it is a good Idea. If you run the fuse and run it in a closed loop then you are more safe than if you just run the closed loop or if you just run the fuse! Contrary to popular belief power does NOT run from Pos to Neg but the other way around. If you connect the second batt the same way most connect an amp then you are charging the frame of the vehicle with another 12v power supply. If your amps are grounded to the car and not to the neg on the batt then you are also charging the frame. In line fuses don't do anything for the amps, they are only there to protect the car in case of a electrical shock. If you run the amp's ground to the car and then do the same with a batt you will have to run even larger fuses to protect your car. [/QUOTE]

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