They are in perfect condition, 9 - 12 mo. old not sure on the hours, i would say an avg of 2-4 hrs per wk. When not being used they are stored in room temp, with 25 -50 % battery used until the night before the hunt when i charge them up if needed. Just like Garmin reccomends for maximum longevity.
Grant
214 251 5720
planodrx@tx.rr.com