There was a really good article in a recent issue of Model Aviation about Lipo batteries. While it is true there have been some documented cases of Lipo's catching fire, for the most part the myth that Lipo's are dangerous is a myth. For years we have been using them in our phones and computers with no problems. Most cases of Lipo failure are due to operator error. Mainly from improper charging, overheating from a improper set up, or using a damaged pack.