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Originally Posted by NeilBlanchard
As far as I know, the Prius RFID key has a long battery life.
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A true RFID key wouldn't need a battery, since it's a passive device that uses the energy from the reader for its signal.
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By the way, I have only owned 6 cars, and some of their keys did wear out, so much that I had to use the spare, if I didn't want to fight with it.
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Yeah, I've worn out a key or two in my time, but I could easily get a replacement key cut for a couple of bucks. Now, from what I understand, getting a replacement or spare means going through the dealer and paying, if not an arm & leg, at least a couple of fingers & toes.