The battery also supports reverse charging which means it can be used as a power source for other devices.
http://www.notebookcheck.net/Oukitel-K10000-boasts-15-days-battery-life.155870.0.html
Wow, now thats an achievement for a 10k battery. The specs are rather decent(might be better with a 1080p screen) and the case looks like it can take it bullet.