I wrote support about the battery questions, and life cycle expectations. Here is the response:
"...Nonetheless, after approximately 300 (full) charge cycles it can be assumed that the battery will hold around 80% of it's initial power. We will offer some kind of battery service, about which the cost/procedural details will be announced later. Also, the battery is covered under the warranty for defects or malfunctions or other issues of that sort. Basically, if there is a legitimate problem, we're definitely going to take care of you."
So if you follow that reasoning the device will go through about 1,500 charge cycles. If I charge mine once a day it should last for almost 5 years. It is nice to know they will be allowing you to replace the battery. Comforting knowing you will not be left with a brick. Lets hope the battery cost and replacement fees are nominal.