Hi, All: we have an 2015.5 xc60 t6 drive-e, and I have some concern for the battery life. Recently we noticed that start/stop had not functioned for a while, and in the setup menu, it showed that the electronic system did not allow use the start/stop function, possible reasons are the battery is charging, or temperature is low. Start/stop still did not work after a 3-hour highway trip, but after another 2-hour highway trip, start/stop started to work again. Yesterday dealer test-drove it and confirmed that start/stop worked, and then they performed the test on battery. The battery failed the test, and they replaced the battery. It was only about 2 years. Does start/stop dramatically decrease battery life? Thanks!