#WhatsNew – Technology that changed the world! Battery Powered Heated Butter Knife is the Next Best Thing Since Slice Bread. There is a small battery installed in knifes handle. On action of press of button, battery generates heat and send it to a front section because of which knifes blade become hotter upto 41° C with in fraction of seconds. This temperature is enough to melt solid cold butter. (Image copyrights belong to their respective owners)