Assess the level of the emotion anger in the tweet provided. Use the following categories: 0: no anger can be inferred, 1: low amount of anger can be inferred, 2: moderate amount of anger can be inferred, 3: high amount of anger can be inferred.
Tweet: Since the 'update' my @iPhone loses power nearly 40% faster.  #furious
3: high amount of anger can be inferred