Score Doubler

 is a power-up that is exclusive to the chinese version of Angry Birds, the chinese version of Angry Birds Seasons, the chinese version of Angry Birds Rio, and Angry Birds Time Travel. It costs 1 Chinese Yen ($0.16) for 5 s, 10 Chinese Yen ($1.57) for 45 s, and 20 Chinese Yen ($3.14) for 100 s.