Sorry to hear of your problem with your second-generation Flir One device. I hate it when cool gadgets break. I know it's been a while since you posted but I'll answer in case you still have it or someone has the same questions. If the app on your phone isn't detecting it after replacing the battery then about the only (easy) thing I can suggest is that you verify that the device's connector is seating all the way into the phone's Lightning/USB OTG port. The first and second generation devices had short connectors that don't work well - or at all - when a phone has a protective case on it. If you haven't already, try using the Flir One with your phone removed from its case. Regarding repurposing the "Lepton" module inside the Flir One: Yes, it's doable assuming the module itself isn't toasted. I was able to remove the module from a second-generation Flir One and use it with a "tCam Mini" device from Dan Julio Designs that I purchased through GroupGets. The tCam Mini is a standalone thermal camera that...