That is pretty good news. I was hoping that they would last for a considerable amount of time. I am working on picking up a Garmin Head Unit (Edge 800) so I won't have to worry about batteries for it. I have been just more interested in the Quarq for cost considerations, but if they are anywhere near as reliable over the long haul, I will have to pick one up. I really just wanted to make sure that for this kind of money that it would be more of a durable good than a consumable. Thanks for the information!