Guys, I don't have any specifics on battery life since it's based on a lot of factors such as storage temperature, charging habits, usage, etc. The internal battery is covered by the 3 year warranty, so you will not need to worry about it for at least that period of time. Beyond that, I checked with the service department and we've received very, very few Syslites in for warranty repair, which would be inclusive battery replacement.
Shane