As a previous iphone owner, I love this SGS4G phone so far. It turned out that I can live with 512MB memory for internal apps or with no LED flash. But its battery life is too short even comparing with iphone 3GS. 2-3 hours of its intense use will drain the battery out completely. So my question is what is alternative. Of course, I can carry additional batteries. But is there any battery with better capacity for this phone?