$649 on amazon: http://www.amazon.com/dp/B00EOE0WKQ/ref=tsm_1_tw_s_amzn_n7do94
In all seriousness, the official product page: http://www.amazon.com/dp/B00EOE0WKQ
says "up to 285 hours of standby time, up to 22 hours of talk time, up to 65 hours of audio playback, and up to 11 hours of video playback"
That's roughly 12 days of standby time...
You can see an example of it on the amazon phone page's video: http://www.amazon.com/Amazon-Fire-Phone-32GB-AT/dp/B00EOE0WKQ
It looks impressive visually.
that was cheap and sold directly on Amazon. This seems to be only selling on ATT
http://www.amazon.com/Amazon-Fire-Phone-32GB-AT/dp/B00EOE0WKQ/
There are 5 cameras on the front of the phone. The 4 in the corners are for dynamic perspective. Amazon actually calls them "ultra-low power specialized cameras." The 5th camera by the earpiece is the typical front facing camera.
Info here: http://www.amazon.com/gp/product/B00EOE0WKQ?ie=UTF8&at=&force-full-site=1
According to the specs at the bottom of this page, it's ridiculously good:
Battery size: 2400mAh. Talk time: up to 22 hours; standby time: up to 285 hours. Video playback: up to 11 hours; audio playback: up to 65 hours.
$649 unlocked on Amazon
Official Link: http://www.amazon.com/dp/B00EOE0WKQ
Actual video with information here