the second battery was in the package with the Zen micro as an extra, I live in Italy, I dunno about other countries thought.
Right now I have my options narrowed down to the Rio Carbon and Creative Zen Micro. My only hang-up is the battery life. The Rio spanks the Zen in battery life but the Zen does have the option of an additional battery (for an additional price of course). The Rio has around 20 hours while the Zen has around 12. From those of you with experience with these things, is this really a big deal?
Also, I was wondering if the extra battery for the Zen can be charged while out of the player? And, what's the difference between the Carbon and the Carbon Pearl?
I would really appreciate any help whatsoever! Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic