“What battery does this model use? I have the old ST motion sensor which uses a CR2477 battery which is proving difficult to find from a retailer.”

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• I have this new unit and the older unit. The new (current) version takes 1 x CR2 battery which is actually sold in retail stores like Best Buy. For the older unit, I had to order replacement CR2477 batteries online through Amazon.

  Answered by MJOrlando 6 years ago

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• Panasonic or Duracell Battery CR2450.

  Answered by chaven87 6 years ago

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• Using CR 2 Lithium 3V

  Answered by VLong 6 years ago

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• This device uses a (CR2477) battery.

  Answered by CommunityAnswer 6 years ago

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• This version uses a CR2 Lithium battery.

  Answered by Arlowemo 6 years ago

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