Have 2018 XC90 T6. Love the car. With 2 keyfobs one works fine. The other keyfob, which I use daily drains the battery in 3 weeks or less. The other keyfob which my wife uses only on rare occasions has a 3 year old battery never replaced. Anyone else with a similar issue or thoughts on troubleshooting?? According to my battery tester, the batteries when new are to spec. They are Duracell batteries.