Here is a questions that I can not seem to get an answer to. I have been told that Magic Bands have a battery in them that will last somewhere between a year and three years. I have been told there a two RFD chips in the Magic Band. One up for use up close and one for a greater distance. When the battery is starting to get weak the one RFD chip will still work on devices that you touch "Mickey to Mickey", but the other will not work on things like photo pass on attractions. My questions is how do I know that my Magic Band battery is not going to work on the second RFD chip? Any one know?