Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Low Battery life ! Worst customer service !

I purchased this phone thru Amazon.com in May, 2005. Phone worked great for 2 to 3 months and now battery charged overnight, lasts only 15-20 minutes. Yesterday, I called Panasonic customer service and it was worst than the battery quality. This support person wasted 45 minutes of my time troubleshooting this problem. Oh Come on ! This overseas support is useless and I felt like I ran into a brickwall. He kept denying that battery should be under warranty for one year.