This is the first year , I had trouble starting my 2010Z perhaps due to the longer period of not starting it once every few weeks due to this brutal winter this year. Just picked up one of the battery tender from Amazon( alternative brands are Noco or Ctek ) and no regrets. Its less than $50 and btw, if you can afford a Z , Iķi bet you can afford one of these devices for peace of mind. Have been using these chargers for my boat too during off season storage and its well worth the $50
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