I've been wondering what I'm going to do when the battery in my Focus 40 Blue dies. I don't expect this to happen in the short term, but I still have to wonder what I'm going to do 5 or 10 years down the road. This is the original Bluetooth model from 2009 that I got for $350 used. Is it possible to find replacement batteries for this or am I going to have to keep it connected via USB or the power adapter? Does Freedom Scientific still support this model? I highly doubt it and even if they did, they would probably charge outrageous prices if I contacted them.