Instruct: Classify a given review into positive or negative sentiment.
Query: Great Phone - Horrible Battery Life

The phone itself could be great. It has every feature that the average person could ever need. Fairly easy to figure out and use also. The problem... the battery lasts only for about a half an hour of talk time (after being on the charger all day) before it cuts out and can not be used again for several more hours. Over all, I would have to say not worth the aggravation