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Smart key battery dies repeatedly


seenitall

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I have a 2006 LS430.  The battery in the smart key fob generally lasted for 2 years or more until 6 weeks ago.  When I replaced the battery, the fob worked fine, but only for about 3 weeks.  I replaced it again, and again only 2-3 weeks of life.  I can't believe both replacement batteries -- which were from different packages with different distant expiration dates -- were both defective.  Is there a short in the key fob that is now draining its battery?  Has anyone experienced this before?  And what might be a fix?  Thanks.

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Duracell is my battery of choice for the smart key.

My '04 came with 2 owner keys and a valet key.

One of my owner keys has some issues with battery life-so I use it as a backup key, kept in a zip- lock with battery removed.

 

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