But the battery was not dead. I was 50 miles into a 300 mile drive when they lights went on. I stopped, read the manual and it was ok to keep driving. So I continued on my way. So issue with the battery, but it's 7 years old.
These cars are very voltage sensitive. A 7 year old battery is begging to be changed. You've been given very good advise or you can take it to the dealer, it's your money.