Hi Geoffrey, I've bought my GH-625M in May 2009. Since then, the heart rate monitor never worked fine - have the over 200 bpm issue as well. New battery, contact gel and the latest software didn't solve the problem. This belt sucks. So what can I do? Is it possible to get new belt (where? I'm living in Germany) - and would that work finally? Hoping for help, thanks a lot.