What is the maximum battery life that people get out of their FR230 only in training mode? I don't use activity tracking or smart notifications. I need to get through a 12 hour race with just GPS and connected to the chest strap HRM. Will my FR230 be capable?
Well... the definite answer to that is "maybe". A new and fully charged Forerunner 230 that is not connected to a smartphone can certainly do this. It even states in the technical documentation that it supports up to 16 hours of GPS and up to 12 hours of GPS+GLONASS activities on a single charge. The thing with batteries is that they hold less charge as they age (heavily depending on ambient temperature and number of charging cycles).
My suggestion for you would be to download a battery meter from the Connect IQ store to your watch and see how much the battery level drops after a couple of shorter activities. As battery usage is pretty linear during activities, you should be able to extrapolate how many hours your watch can last on one full charge.
