@pintovski, it appears your questions have been answered.
For other that may read this far in the future, As ShapeShifter has pointed to (others have suggested) we can quote the follow:
From: Yun - Hardware Guide, in the power section:
VIN. The input voltage to the Arduino board. Unlike other Arduino boards, if you are going to provide power to the board through this pin, you must provide a regulated 5V.
From: Yun - Getting Started Guide in the section Differences from the Arduino Leonardo
There is no built in 5V regulator. If you power your Yún with more than 5V, you will likely damage it. If you are not powering the Yún from the micro-USB connection, you can apply power to the VIN and 5V pins on the board. If using the VIN pin, you cannot provide more than 5V, it will damage your board. It is recommended to power the Yún from the USB connection whenever possible.
From: Yun - Arduino Playground in the section Power consumption of the board
Power consumption in mA
Configuration min typical max
WiFi on, no wired connection, no sd 170 240 300
WiFi on, wired connection, no sd - 277 -
WiFi on, wired connection, no sd, max. load 315