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      04-10-2010, 07:14 PM   #8
GenePoole
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Drives: '06 E90 330i
Join Date: Apr 2010
Location: Brighton, IL

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Quote:
Originally Posted by fuzzy123 View Post
Does the RFID chip require power? i thought it was just detected by the car, either way.. something a little thicker than a CR 2032 would be sufficient for me... Also I dont need lock/unlock or anything... All I want to do is be able to access the vehicle
The RFID part of the FOB doesn't require power. The rest of the FOB functionality (remote door opening, etc.) uses the internal battery.