Hi All,
I read few posts about bad battery life in HRM Dual, my died after 10min workout when I saw low battery message, I bit disappointed as tought it should last 1h session.
According to Garmin battery should last about 3.5 year, I bought device 13 September and died 30 November about 1h use every day, so looks like my strap is the one with battery life problem.
What is different, I have replaced battery, tried 3 ikea batteries, then brand new philips, they all show low or critical battery level when strap connected to garmin edge 1040 or my epix but, I did reverse polarity method, as not found any other way how to restart HRM, did not help. Finally I have tested all batteries using multimeter, ikea 3.3V, philips 3.2V so definitely they are good.
Not sure what I can do more, there is so many topics saying even replaced strap have the same problems, should I save some time and just ask for refund?