You can very well change the battery in your HR monitor like I did. It's basically designed like a watch and really does not require sending it in if you have some mechanical aptitude and dexterity.
Thanks for your NE's XC votes. 10 so far. It will be interesting to see how the race comes around.
Observed one coyote in the Poor Farm Meadow Area
am: 41,windy, humid,raw, Haynes Loop 5M in 33:45 for a 6:45\mile pace -HR 139
noon: 46,windy,humid,Haynes Loop 5M in 31:42 for a 6:20\mile pace -HR 143
3 days ago