Hi,
I bought a Garmin 735XT and the Garmin HRM Run chest transmitter about 6 months ago. I'm only getting about 30 hours use at the very most from the chest transmitter battery before having to replace it with a new one. Is this normal? I see that garmin states over 300 hours use from a new battery. I'm not getting a fraction of this for some reason. The transmitter is well looked after and always wiped and dried thoroughly after every use. Is this likely to be a faulty unit? Is it worth asking Garmin for a replacement?