Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Keeps fantastic time...battery change expensive

Love my Tag Indy 500...only loses a few seconds every 6 months. Mine needed a new battery after 20 months. When I took it to a store that sells and services them, they told me to change the battery, they have to change the gaskets too and it would cost $100. I called Tag Heuer and they told me only Tag's Service Center is authorized to change the battery and they refused to tell me how much until I shipped it to them. They weren't too concerned about my dilemma. By some stroke of luck, they told me that I could send it back under the 2 year warranty and they would change the battery at no charge. That worked this time...but now every 2 years, it will cost me $100 plus shipping and insurance to change the battery.