Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not compatable with my dell latitude D520

got delivered fast. put it in and my dell latitude d520 would not recognize it. i called dell, no help because it wasn't from them. called the battery company, they were friendly but could not solve my problem. they also said they'd call me back which they never did. they were going to see if it was possibly just the one i received and get permission to send me a new one. i returned it and they gave me a full credit. i was trying to save $ but i had to order a new battery from dell. that lasted less then 6 months. now i'm using my plug again.