The reason I was interested in XR R range was that I was thinking about removing the battery completely from my XBR, because I was told that my standard XBR alternator will fry any tiny battery I hook it into. However, I've done a lot of research and am quite sure that alternators can't force feed current to a battery, if it doesn't need it. The only way this alternator could boil a battery was if the alternator or the regulator/rectifier was faulty.