If you read this and thought "there has to be a catch..." well, your suspicions are well-founded. The K10000's performance is quite modest, to put it mildly. You're looking at a quad-core 1GHz MediaTek processor, 720p (if 5.5-inch) screen, 8-megapixel rear camera, 2-megapixel front cam and 16GB of expandable storage. Also, don't be surprised if the 3G and LTE don't work in your corner of the globe. Think of this more as an enormous battery with a phone attached than anything else. Even so, that $240 pre-order price (it ships on January 21st) might be hard to resist if you're looking for a smartphone that will keep running through that next camping trip.
Source: http://www.engadget.com/2015/12/13/smartphone-with-10-day-battery/
Source: https://www.youtube.com/watch?v=ZxxYjJUGZjs