Quote:
Originally Posted by ChrisSlicks
When I took mine apart I didn't identify anything that could control the transmitter power. Are you saying you actually measured the output? I didn't go as far as actually probing the circuit so if that's the case it is interesting. But I'll still keep the key in my pocket and replace the $1 battery when the time comes.  |
I keep mine in my pocket as well. I was just answering OP's question.
More accurately, TX power stays roughly the same, but the more power is received, the less that needs to be supplied by the battery. With a high enough RX power, the unit functions almost as a passive RFID.