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#17: 01-19-2013, 08:41 PM
 
 GravityGear
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Title: Monkey
Location: Los Angeles CA
Car: 2010 LGT, my wheels fit
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why do you need 2 batteries? i've had audio systems with 3x that power and just used one optima yellow top. are you gonna be using the thing with the engine off all the time or are you competing? when the car is on it's all about the alternator. invest in a solid high output alternator, or get your stock one reworked. unless your competing, doing a lot of parking lot bumping with the engine off or just want to look cool, 2 batteries is pointless. also causes MASSIVE headaches if your installer messes it up or fails to set up the battery isolator properly. 5kw is not that much.
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