Quote:
Originally Posted by Weasel
The battery in the key is recharged wirelessly... a coil in the black round part around the key hole charges up and releases causing a charge to build in a coil in the key, which charges the battery. Think of it as a small, low power version of an ignition coil. There is no physical link from the charging input to the voltage output.
And on a fully discharged BMW key it takes 48-72 hours straight to bring it back to full charge.
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Sorry if I wasn't more clear in this.. If you ever take a key apart, this coil assembly will be very obvious. It's a small rod assembly wrapped in copper wire. It produces the charge for the ignition circuit.
No, the unit will NOT start the car without the PCB. That's the nature of the security aspect. The key rod itself will only turn the ingition assembly, but the internal relays will not pass power to the starter motor unless the unlock code is produced by the security chip in the key fob.