I can confirm. Almost 3 years with an GTR 3 and I get 10-14 days, depeding if I do outside activities where GPS draws a bit more then normal. Rock solid and wat

I can confirm. Almost 3 years with an GTR 3 and I get 10-14 days, depeding if I do outside activities where GPS draws a bit more then normal. Rock solid and waterproof ( perfect for swimming! )