So, I'm guessing the battery life is pretty good then? 10-12 hours a day is some heavy usage. This is a bit nit-picky, but I am getting tired of running with my 60 gig video ipod on my arm. This little guy may be just what the doctor ordered!
I usually got almost 2 full days of mowing in on one AAA. I could have got more time in but I did two things to drain battery life:
1. I bumped up the amount of time until auto shut off so that if I was in the middle of a good jam, and I had to travel to another lawn, I wouldn't have to start from the beginning (and my time was set to 20min).
2. Even though I had noise canceling headphones, I still had to pump up the volume a little bit.