Hey, Doug. I tried sending by PM but your box is full. I bought an OC1 in the spring and have been pretty happy with it. I've used it for one trip and a number of local and training dives, but not really a lot. I'm headed to the pool today in advance of a trip in two weeks and it's showing low battery. Wow, that's surprising. I've had a number of other computers and never burned through a battery that fast. A couple of questions for you. First, is that normal??? Second, how can I get the battery replaced before my trip? Thanks