When I try to start my car I get the solenoid chattering. Eventually it will start turning over slowly then it speeds up and fires. When I jump or charge the battery, it starts normally. Battery is a JC made for Toyota. I'm guessing original. It has bad connection internally. If it turns out to be the starter or a loose connection, meh, 5 yrs out of a battery isn't so bad. I din't trade it in for the core though, I replaced it with a Maxx 725 CCA
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