I am using adventurer for one and half year and for this period i have run round 1300 km. so i am mostly weekender runner and i dont use watches for 24/7 monitoring. it means usage of watches is incidental. I never had problem with battery. It s capacity for this period has corresponded with manufacturer ´s claim. Now suddenly, capacity dramatically has decreased. After 3 hours of run it is almost off, menwhile i am using the same settings (hr + gps) as before. Is it possible to claim that problem as 2 years warranty ?