Am very happy to say that I've finally made the jump and have picked up a used PowerTap and am excited to begin training with power. I have a couple of newby questions...

1. I'm going to replace all of the batteries and start with fresh ones right out of the gate. How long do the batteries last if I'm on the bike 4 - 8 hours a week?
2. What's the best software to review my power data with? I communicate with my coach via TrainingPeaks so regardless of the software I'm using to view my power data, I'll need to be able to upload it to share with my coach online.

Thanks for any help.