Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Since the 'update' my @iPhone loses power nearly 40% faster.  #furious
This tweet contains emotions: 
anger, disgust, sadness