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CCA for second battery
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<blockquote data-quote="wew lad" data-source="post: 8381917" data-attributes="member: 665412"><p>You need an isolator if you run two dissimilar batteries together, or batteries with different resting voltages, or different cca ratings. Stop telling people you don't need it unless you run it with your car off, a battery isolator does more than turn off your starting battery when the key is off. It prevents current flow between the batteries.</p><p></p><p>OP, a battery will help but don't expect it to be a solution. You will likely still drop to your battery resting voltage because you're unable to pull more current from your alternator than it's able to produce. Keep in mind as soon as you use any battery capacity your alternator now has to charge the battery and run your amps.</p></blockquote><p></p>
[QUOTE="wew lad, post: 8381917, member: 665412"] You need an isolator if you run two dissimilar batteries together, or batteries with different resting voltages, or different cca ratings. Stop telling people you don't need it unless you run it with your car off, a battery isolator does more than turn off your starting battery when the key is off. It prevents current flow between the batteries. OP, a battery will help but don't expect it to be a solution. You will likely still drop to your battery resting voltage because you're unable to pull more current from your alternator than it's able to produce. Keep in mind as soon as you use any battery capacity your alternator now has to charge the battery and run your amps. [/QUOTE]
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CCA for second battery
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