Do I need a secondary battery?

Actually one last question...some websites say battery must be fully charged before install. These batts don’t come charged? 
they slowly discharge as they sit there, and usually just come with a small charge anyways. The big thing is to not beat on it until its fully charged. You can install it just like any normal battery, just dont go crankin on the system for the first 30 to 45 min of driving.

 
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