Nope, the plastic on the warranty stickers goes brittle, and can easily be pushed in, without intending to.
I'd agree it hasn't been opened.
It isn't a 500+, so it doesn't have a battery.
Hmnm the light was reflecting off the badge too much for me to tell, but it looked like a 500+ badge and it ships with KS 2.04 by the looks of it, also the motherboard seems to say A500+ and has space for a (removed) battery...