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How long will a 996 battery last?

  • 2003
  • 911 Carrera Cabriolet
31 000
Electrical and Electronic
New York

I keep my battery connected to a trickle charger in the winter, but it recently died.  I replaced the alternator 2 years ago, but the battery is 5+ years old.  Should 996 batteries be replaced after a certain amount of time as part of regular maintenance?

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