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Originally Posted by Kylie
I don't believe a word if it. So dog ate the silicon chip, but not the battery, or indeed the key that would hold the two together. So how the hell would that work inside the dog, he got a 3 volt supply in there? Tis fantasy.
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The chips are usually simple RFID devices, powered by electrickery induced by the radio signals from the car's immobiliser. The chip then simply 'broadcasts' back its unique ID. The immobiliser checks the ID and decides if it's the right one.