You're getting the Boost logo at startup? Did you use the correct Odin image? Sounds like you used Odin but you used the Boost image instead of the Prevail image.
You should make sure of what you downloaded and try again. As for the battery problem the only time I got that message was when I was trying to have a backup battery from an older Samsung phone that had the same exact battery. Once I put the original batter back in everything went back to normal. Did you someone swap your battery? Did you swap your battery perhaps? Should give you some ideas as to what to try...