Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: First 3G prototype micro fuel cell unveiled NTT DoCoMo, the top cellular phone operator in Japan, has unveiled what it calls the nation #39;s first prototype micro fuel cell aimed at boosting battery life for its powerful third-generation FOMA handsets.

Sci/Tech