I bought a new battery approx 3 years ago, yellow top Optima thru the club. Never have had a issue with it till recently. I had a New Kenwood Head unit installed and speaker up grade. Had it in the garage for a couple of weeks with a tender and when I tried to start it the battery was dead. Jump started it took it for a ride. Plugged tender back in and now dead again. I don't know if Radio installer ran battery down or its a fluke battery just died? What are members recommending for a replacement?
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